20491575

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{21017}}^1$

素因数の和:21043

約数の個数: 24

約数和(自身を含む): 36487248

約数和(自身を除く): 15995673

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 195, 325, 975, 21017, 63051, 105085, 273221, 315255, 525425, 819663, 1366105, 1576275, 4098315, 6830525, 20491575]

約数ペア:

[(1, 20491575), (3, 6830525), (5, 4098315), (13, 1576275), (15, 1366105), (25, 819663), (39, 525425), (65, 315255), (75, 273221), (195, 105085), (325, 63051), (975, 21017)]