20879880

素因数分解:

$2^3\times 3^1\times 5^1\times 7^2\times {\mathrm{53}}^1\times {\mathrm{67}}^1$

素因数の和:148

約数の個数: 192

約数和(自身を含む): 75349440

約数和(自身を除く): 54469560

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 49, 53, 56, 60, 67, 70, 84, 98, 105, 106, 120, 134, 140, 147, 159, 168, 196, 201, 210, 212, 245, 265, 268, 280, 294, 318, 335, 371, 392, 402, 420, 424, 469, 490, 530, 536, 588, 636, 670, 735, 742, 795, 804, 840, 938, 980, 1005, 1060, 1113, 1176, 1272, 1340, 1407, 1470, 1484, 1590, 1608, 1855, 1876, 1960, 2010, 2120, 2226, 2345, 2597, 2680, 2814, 2940, 2968, 3180, 3283, 3551, 3710, 3752, 4020, 4452, 4690, 5194, 5565, 5628, 5880, 6360, 6566, 7035, 7102, 7420, 7791, 8040, 8904, 9380, 9849, 10388, 10653, 11130, 11256, 12985, 13132, 14070, 14204, 14840, 15582, 16415, 17755, 18760, 19698, 20776, 21306, 22260, 24857, 25970, 26264, 28140, 28408, 31164, 32830, 35510, 38955, 39396, 42612, 44520, 49245, 49714, 51940, 53265, 56280, 62328, 65660, 71020, 74571, 77910, 78792, 85224, 98490, 99428, 103880, 106530, 124285, 131320, 142040, 149142, 155820, 173999, 196980, 198856, 213060, 248570, 298284, 311640, 347998, 372855, 393960, 426120, 497140, 521997, 596568, 695996, 745710, 869995, 994280, 1043994, 1391992, 1491420, 1739990, 2087988, 2609985, 2982840, 3479980, 4175976, 5219970, 6959960, 10439940, 20879880]

約数ペア:

[(1, 20879880), (2, 10439940), (3, 6959960), (4, 5219970), (5, 4175976), (6, 3479980), (7, 2982840), (8, 2609985), (10, 2087988), (12, 1739990), (14, 1491420), (15, 1391992), (20, 1043994), (21, 994280), (24, 869995), (28, 745710), (30, 695996), (35, 596568), (40, 521997), (42, 497140), (49, 426120), (53, 393960), (56, 372855), (60, 347998), (67, 311640), (70, 298284), (84, 248570), (98, 213060), (105, 198856), (106, 196980), (120, 173999), (134, 155820), (140, 149142), (147, 142040), (159, 131320), (168, 124285), (196, 106530), (201, 103880), (210, 99428), (212, 98490), (245, 85224), (265, 78792), (268, 77910), (280, 74571), (294, 71020), (318, 65660), (335, 62328), (371, 56280), (392, 53265), (402, 51940), (420, 49714), (424, 49245), (469, 44520), (490, 42612), (530, 39396), (536, 38955), (588, 35510), (636, 32830), (670, 31164), (735, 28408), (742, 28140), (795, 26264), (804, 25970), (840, 24857), (938, 22260), (980, 21306), (1005, 20776), (1060, 19698), (1113, 18760), (1176, 17755), (1272, 16415), (1340, 15582), (1407, 14840), (1470, 14204), (1484, 14070), (1590, 13132), (1608, 12985), (1855, 11256), (1876, 11130), (1960, 10653), (2010, 10388), (2120, 9849), (2226, 9380), (2345, 8904), (2597, 8040), (2680, 7791), (2814, 7420), (2940, 7102), (2968, 7035), (3180, 6566), (3283, 6360), (3551, 5880), (3710, 5628), (3752, 5565), (4020, 5194), (4452, 4690)]