31231480

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{1571}}^1$

素因数の和:1660

約数の個数: 64

約数和(自身を含む): 81492480

約数和(自身を除く): 50261000

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 71, 140, 142, 280, 284, 355, 497, 568, 710, 994, 1420, 1571, 1988, 2485, 2840, 3142, 3976, 4970, 6284, 7855, 9940, 10997, 12568, 15710, 19880, 21994, 31420, 43988, 54985, 62840, 87976, 109970, 111541, 219940, 223082, 439880, 446164, 557705, 780787, 892328, 1115410, 1561574, 2230820, 3123148, 3903935, 4461640, 6246296, 7807870, 15615740, 31231480]

約数ペア:

[(1, 31231480), (2, 15615740), (4, 7807870), (5, 6246296), (7, 4461640), (8, 3903935), (10, 3123148), (14, 2230820), (20, 1561574), (28, 1115410), (35, 892328), (40, 780787), (56, 557705), (70, 446164), (71, 439880), (140, 223082), (142, 219940), (280, 111541), (284, 109970), (355, 87976), (497, 62840), (568, 54985), (710, 43988), (994, 31420), (1420, 21994), (1571, 19880), (1988, 15710), (2485, 12568), (2840, 10997), (3142, 9940), (3976, 7855), (4970, 6284)]