81533420

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{99431}}^1$

素因数の和:99481

約数の個数: 24

約数和(自身を含む): 175398048

約数和(自身を除く): 93864628

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 99431, 198862, 397724, 497155, 994310, 1988620, 4076671, 8153342, 16306684, 20383355, 40766710, 81533420]

約数ペア:

[(1, 81533420), (2, 40766710), (4, 20383355), (5, 16306684), (10, 8153342), (20, 4076671), (41, 1988620), (82, 994310), (164, 497155), (205, 397724), (410, 198862), (820, 99431)]