81462560

素因数分解:

$2^5\times 5^1\times {\mathrm{71}}^2\times {\mathrm{101}}^1$

素因数の和:258

約数の個数: 72

約数和(自身を含む): 197136828

約数和(自身を除く): 115674268

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 71, 80, 101, 142, 160, 202, 284, 355, 404, 505, 568, 710, 808, 1010, 1136, 1420, 1616, 2020, 2272, 2840, 3232, 4040, 5041, 5680, 7171, 8080, 10082, 11360, 14342, 16160, 20164, 25205, 28684, 35855, 40328, 50410, 57368, 71710, 80656, 100820, 114736, 143420, 161312, 201640, 229472, 286840, 403280, 509141, 573680, 806560, 1018282, 1147360, 2036564, 2545705, 4073128, 5091410, 8146256, 10182820, 16292512, 20365640, 40731280, 81462560]

約数ペア:

[(1, 81462560), (2, 40731280), (4, 20365640), (5, 16292512), (8, 10182820), (10, 8146256), (16, 5091410), (20, 4073128), (32, 2545705), (40, 2036564), (71, 1147360), (80, 1018282), (101, 806560), (142, 573680), (160, 509141), (202, 403280), (284, 286840), (355, 229472), (404, 201640), (505, 161312), (568, 143420), (710, 114736), (808, 100820), (1010, 80656), (1136, 71710), (1420, 57368), (1616, 50410), (2020, 40328), (2272, 35855), (2840, 28684), (3232, 25205), (4040, 20164), (5041, 16160), (5680, 14342), (7171, 11360), (8080, 10082)]