20644975

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{457}}^1$

素因数の和:619

約数の個数: 24

約数和(自身を含む): 27828080

約数和(自身を除く): 7183105

約数列:

[1, 5, 13, 25, 65, 139, 325, 457, 695, 1807, 2285, 3475, 5941, 9035, 11425, 29705, 45175, 63523, 148525, 317615, 825799, 1588075, 4128995, 20644975]

約数ペア:

[(1, 20644975), (5, 4128995), (13, 1588075), (25, 825799), (65, 317615), (139, 148525), (325, 63523), (457, 45175), (695, 29705), (1807, 11425), (2285, 9035), (3475, 5941)]