80518640

素因数分解:

$2^4\times 5^1\times {\mathrm{499}}^1\times {\mathrm{2017}}^1$

素因数の和:2529

約数の個数: 40

約数和(自身を含む): 187674000

約数和(自身を除く): 107155360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 499, 998, 1996, 2017, 2495, 3992, 4034, 4990, 7984, 8068, 9980, 10085, 16136, 19960, 20170, 32272, 39920, 40340, 80680, 161360, 1006483, 2012966, 4025932, 5032415, 8051864, 10064830, 16103728, 20129660, 40259320, 80518640]

約数ペア:

[(1, 80518640), (2, 40259320), (4, 20129660), (5, 16103728), (8, 10064830), (10, 8051864), (16, 5032415), (20, 4025932), (40, 2012966), (80, 1006483), (499, 161360), (998, 80680), (1996, 40340), (2017, 39920), (2495, 32272), (3992, 20170), (4034, 19960), (4990, 16136), (7984, 10085), (8068, 9980)]