81931120

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{24979}}^1$

素因数の和:25033

約数の個数: 40

約数和(自身を含む): 195143760

約数和(自身を除く): 113212640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 24979, 49958, 99916, 124895, 199832, 249790, 399664, 499580, 999160, 1024139, 1998320, 2048278, 4096556, 5120695, 8193112, 10241390, 16386224, 20482780, 40965560, 81931120]

約数ペア:

[(1, 81931120), (2, 40965560), (4, 20482780), (5, 16386224), (8, 10241390), (10, 8193112), (16, 5120695), (20, 4096556), (40, 2048278), (41, 1998320), (80, 1024139), (82, 999160), (164, 499580), (205, 399664), (328, 249790), (410, 199832), (656, 124895), (820, 99916), (1640, 49958), (3280, 24979)]