81649680

素因数分解:

$2^4\times 3^1\times 5^1\times 7^2\times {\mathrm{53}}^1\times {\mathrm{131}}^1$

素因数の和:214

約数の個数: 240

約数和(自身を含む): 302284224

約数和(自身を除く): 220634544

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 49, 53, 56, 60, 70, 80, 84, 98, 105, 106, 112, 120, 131, 140, 147, 159, 168, 196, 210, 212, 240, 245, 262, 265, 280, 294, 318, 336, 371, 392, 393, 420, 424, 490, 524, 530, 560, 588, 636, 655, 735, 742, 784, 786, 795, 840, 848, 917, 980, 1048, 1060, 1113, 1176, 1272, 1310, 1470, 1484, 1572, 1590, 1680, 1834, 1855, 1960, 1965, 2096, 2120, 2226, 2352, 2544, 2597, 2620, 2751, 2940, 2968, 3144, 3180, 3668, 3710, 3920, 3930, 4240, 4452, 4585, 5194, 5240, 5502, 5565, 5880, 5936, 6288, 6360, 6419, 6943, 7336, 7420, 7791, 7860, 8904, 9170, 10388, 10480, 11004, 11130, 11760, 12720, 12838, 12985, 13755, 13886, 14672, 14840, 15582, 15720, 17808, 18340, 19257, 20776, 20829, 22008, 22260, 25676, 25970, 27510, 27772, 29680, 31164, 31440, 32095, 34715, 36680, 38514, 38955, 41552, 41658, 44016, 44520, 48601, 51352, 51940, 55020, 55544, 62328, 64190, 69430, 73360, 77028, 77910, 83316, 89040, 96285, 97202, 102704, 103880, 104145, 110040, 111088, 124656, 128380, 138860, 145803, 154056, 155820, 166632, 192570, 194404, 207760, 208290, 220080, 243005, 256760, 277720, 291606, 308112, 311640, 333264, 340207, 385140, 388808, 416580, 486010, 513520, 555440, 583212, 623280, 680414, 729015, 770280, 777616, 833160, 972020, 1020621, 1166424, 1360828, 1458030, 1540560, 1666320, 1701035, 1944040, 2041242, 2332848, 2721656, 2916060, 3402070, 3888080, 4082484, 5103105, 5443312, 5832120, 6804140, 8164968, 10206210, 11664240, 13608280, 16329936, 20412420, 27216560, 40824840, 81649680]

約数ペア:

[(1, 81649680), (2, 40824840), (3, 27216560), (4, 20412420), (5, 16329936), (6, 13608280), (7, 11664240), (8, 10206210), (10, 8164968), (12, 6804140), (14, 5832120), (15, 5443312), (16, 5103105), (20, 4082484), (21, 3888080), (24, 3402070), (28, 2916060), (30, 2721656), (35, 2332848), (40, 2041242), (42, 1944040), (48, 1701035), (49, 1666320), (53, 1540560), (56, 1458030), (60, 1360828), (70, 1166424), (80, 1020621), (84, 972020), (98, 833160), (105, 777616), (106, 770280), (112, 729015), (120, 680414), (131, 623280), (140, 583212), (147, 555440), (159, 513520), (168, 486010), (196, 416580), (210, 388808), (212, 385140), (240, 340207), (245, 333264), (262, 311640), (265, 308112), (280, 291606), (294, 277720), (318, 256760), (336, 243005), (371, 220080), (392, 208290), (393, 207760), (420, 194404), (424, 192570), (490, 166632), (524, 155820), (530, 154056), (560, 145803), (588, 138860), (636, 128380), (655, 124656), (735, 111088), (742, 110040), (784, 104145), (786, 103880), (795, 102704), (840, 97202), (848, 96285), (917, 89040), (980, 83316), (1048, 77910), (1060, 77028), (1113, 73360), (1176, 69430), (1272, 64190), (1310, 62328), (1470, 55544), (1484, 55020), (1572, 51940), (1590, 51352), (1680, 48601), (1834, 44520), (1855, 44016), (1960, 41658), (1965, 41552), (2096, 38955), (2120, 38514), (2226, 36680), (2352, 34715), (2544, 32095), (2597, 31440), (2620, 31164), (2751, 29680), (2940, 27772), (2968, 27510), (3144, 25970), (3180, 25676), (3668, 22260), (3710, 22008), (3920, 20829), (3930, 20776), (4240, 19257), (4452, 18340), (4585, 17808), (5194, 15720), (5240, 15582), (5502, 14840), (5565, 14672), (5880, 13886), (5936, 13755), (6288, 12985), (6360, 12838), (6419, 12720), (6943, 11760), (7336, 11130), (7420, 11004), (7791, 10480), (7860, 10388), (8904, 9170)]