81662840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{113}}^1$

素因数の和:249

約数の個数: 128

約数和(自身を含む): 221616000

約数和(自身を除く): 139953160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 29, 35, 40, 56, 58, 70, 89, 113, 116, 140, 145, 178, 203, 226, 232, 280, 290, 356, 406, 445, 452, 565, 580, 623, 712, 791, 812, 890, 904, 1015, 1130, 1160, 1246, 1582, 1624, 1780, 2030, 2260, 2492, 2581, 3115, 3164, 3277, 3560, 3955, 4060, 4520, 4984, 5162, 6230, 6328, 6554, 7910, 8120, 10057, 10324, 12460, 12905, 13108, 15820, 16385, 18067, 20114, 20648, 22939, 24920, 25810, 26216, 31640, 32770, 36134, 40228, 45878, 50285, 51620, 65540, 70399, 72268, 80456, 90335, 91756, 100570, 103240, 114695, 131080, 140798, 144536, 180670, 183512, 201140, 229390, 281596, 291653, 351995, 361340, 402280, 458780, 563192, 583306, 703990, 722680, 917560, 1166612, 1407980, 1458265, 2041571, 2333224, 2815960, 2916530, 4083142, 5833060, 8166284, 10207855, 11666120, 16332568, 20415710, 40831420, 81662840]

約数ペア:

[(1, 81662840), (2, 40831420), (4, 20415710), (5, 16332568), (7, 11666120), (8, 10207855), (10, 8166284), (14, 5833060), (20, 4083142), (28, 2916530), (29, 2815960), (35, 2333224), (40, 2041571), (56, 1458265), (58, 1407980), (70, 1166612), (89, 917560), (113, 722680), (116, 703990), (140, 583306), (145, 563192), (178, 458780), (203, 402280), (226, 361340), (232, 351995), (280, 291653), (290, 281596), (356, 229390), (406, 201140), (445, 183512), (452, 180670), (565, 144536), (580, 140798), (623, 131080), (712, 114695), (791, 103240), (812, 100570), (890, 91756), (904, 90335), (1015, 80456), (1130, 72268), (1160, 70399), (1246, 65540), (1582, 51620), (1624, 50285), (1780, 45878), (2030, 40228), (2260, 36134), (2492, 32770), (2581, 31640), (3115, 26216), (3164, 25810), (3277, 24920), (3560, 22939), (3955, 20648), (4060, 20114), (4520, 18067), (4984, 16385), (5162, 15820), (6230, 13108), (6328, 12905), (6554, 12460), (7910, 10324), (8120, 10057)]