21797620

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{6449}}^1$

素因数の和:6484

約数の個数: 36

約数和(自身を含む): 49574700

約数和(自身を除く): 27777080

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 169, 260, 338, 676, 845, 1690, 3380, 6449, 12898, 25796, 32245, 64490, 83837, 128980, 167674, 335348, 419185, 838370, 1089881, 1676740, 2179762, 4359524, 5449405, 10898810, 21797620]

約数ペア:

[(1, 21797620), (2, 10898810), (4, 5449405), (5, 4359524), (10, 2179762), (13, 1676740), (20, 1089881), (26, 838370), (52, 419185), (65, 335348), (130, 167674), (169, 128980), (260, 83837), (338, 64490), (676, 32245), (845, 25796), (1690, 12898), (3380, 6449)]