81211010

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{261971}}^1$

素因数の和:262009

約数の個数: 16

約数和(自身を含む): 150895872

約数和(自身を除く): 69684862

約数列:

[1, 2, 5, 10, 31, 62, 155, 310, 261971, 523942, 1309855, 2619710, 8121101, 16242202, 40605505, 81211010]

約数ペア:

[(1, 81211010), (2, 40605505), (5, 16242202), (10, 8121101), (31, 2619710), (62, 1309855), (155, 523942), (310, 261971)]