21657025

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{1801}}^1$

素因数の和:1861

約数の個数: 24

約数和(自身を含む): 29718584

約数和(自身を除く): 8061559

約数列:

[1, 5, 13, 25, 37, 65, 185, 325, 481, 925, 1801, 2405, 9005, 12025, 23413, 45025, 66637, 117065, 333185, 585325, 866281, 1665925, 4331405, 21657025]

約数ペア:

[(1, 21657025), (5, 4331405), (13, 1665925), (25, 866281), (37, 585325), (65, 333185), (185, 117065), (325, 66637), (481, 45025), (925, 23413), (1801, 12025), (2405, 9005)]