20557225

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{1471}}^1$

素因数の和:1537

約数の個数: 24

約数和(自身を含む): 28109312

約数和(自身を除く): 7552087

約数列:

[1, 5, 13, 25, 43, 65, 215, 325, 559, 1075, 1471, 2795, 7355, 13975, 19123, 36775, 63253, 95615, 316265, 478075, 822289, 1581325, 4111445, 20557225]

約数ペア:

[(1, 20557225), (5, 4111445), (13, 1581325), (25, 822289), (43, 478075), (65, 316265), (215, 95615), (325, 63253), (559, 36775), (1075, 19123), (1471, 13975), (2795, 7355)]