81222380

素因数分解:

$2^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{25867}}^1$

素因数の和:26033

約数の個数: 24

約数和(自身を含む): 171660048

約数和(自身を除く): 90437668

約数列:

[1, 2, 4, 5, 10, 20, 157, 314, 628, 785, 1570, 3140, 25867, 51734, 103468, 129335, 258670, 517340, 4061119, 8122238, 16244476, 20305595, 40611190, 81222380]

約数ペア:

[(1, 81222380), (2, 40611190), (4, 20305595), (5, 16244476), (10, 8122238), (20, 4061119), (157, 517340), (314, 258670), (628, 129335), (785, 103468), (1570, 51734), (3140, 25867)]