20412420

素因数分解:

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

素因数の和:210

約数の個数: 144

約数和(自身を含む): 68257728

約数和(自身を除く): 47845308

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 53, 60, 70, 84, 98, 105, 106, 131, 140, 147, 159, 196, 210, 212, 245, 262, 265, 294, 318, 371, 393, 420, 490, 524, 530, 588, 636, 655, 735, 742, 786, 795, 917, 980, 1060, 1113, 1310, 1470, 1484, 1572, 1590, 1834, 1855, 1965, 2226, 2597, 2620, 2751, 2940, 3180, 3668, 3710, 3930, 4452, 4585, 5194, 5502, 5565, 6419, 6943, 7420, 7791, 7860, 9170, 10388, 11004, 11130, 12838, 12985, 13755, 13886, 15582, 18340, 19257, 20829, 22260, 25676, 25970, 27510, 27772, 31164, 32095, 34715, 38514, 38955, 41658, 48601, 51940, 55020, 64190, 69430, 77028, 77910, 83316, 96285, 97202, 104145, 128380, 138860, 145803, 155820, 192570, 194404, 208290, 243005, 291606, 340207, 385140, 416580, 486010, 583212, 680414, 729015, 972020, 1020621, 1360828, 1458030, 1701035, 2041242, 2916060, 3402070, 4082484, 5103105, 6804140, 10206210, 20412420]

約数ペア:

[(1, 20412420), (2, 10206210), (3, 6804140), (4, 5103105), (5, 4082484), (6, 3402070), (7, 2916060), (10, 2041242), (12, 1701035), (14, 1458030), (15, 1360828), (20, 1020621), (21, 972020), (28, 729015), (30, 680414), (35, 583212), (42, 486010), (49, 416580), (53, 385140), (60, 340207), (70, 291606), (84, 243005), (98, 208290), (105, 194404), (106, 192570), (131, 155820), (140, 145803), (147, 138860), (159, 128380), (196, 104145), (210, 97202), (212, 96285), (245, 83316), (262, 77910), (265, 77028), (294, 69430), (318, 64190), (371, 55020), (393, 51940), (420, 48601), (490, 41658), (524, 38955), (530, 38514), (588, 34715), (636, 32095), (655, 31164), (735, 27772), (742, 27510), (786, 25970), (795, 25676), (917, 22260), (980, 20829), (1060, 19257), (1113, 18340), (1310, 15582), (1470, 13886), (1484, 13755), (1572, 12985), (1590, 12838), (1834, 11130), (1855, 11004), (1965, 10388), (2226, 9170), (2597, 7860), (2620, 7791), (2751, 7420), (2940, 6943), (3180, 6419), (3668, 5565), (3710, 5502), (3930, 5194), (4452, 4585)]