80521820

素因数分解:

$2^2\times 5^1\times {\mathrm{211}}^1\times {\mathrm{19081}}^1$

素因数の和:19301

約数の個数: 24

約数和(自身を含む): 169906128

約数和(自身を除く): 89384308

約数列:

[1, 2, 4, 5, 10, 20, 211, 422, 844, 1055, 2110, 4220, 19081, 38162, 76324, 95405, 190810, 381620, 4026091, 8052182, 16104364, 20130455, 40260910, 80521820]

約数ペア:

[(1, 80521820), (2, 40260910), (4, 20130455), (5, 16104364), (10, 8052182), (20, 4026091), (211, 381620), (422, 190810), (844, 95405), (1055, 76324), (2110, 38162), (4220, 19081)]