20558525

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{61}}^2$

素因数の和:162

約数の個数: 36

約数和(自身を含む): 29552796

約数和(自身を除く): 8994271

約数列:

[1, 5, 13, 17, 25, 61, 65, 85, 221, 305, 325, 425, 793, 1037, 1105, 1525, 3721, 3965, 5185, 5525, 13481, 18605, 19825, 25925, 48373, 63257, 67405, 93025, 241865, 316285, 337025, 822341, 1209325, 1581425, 4111705, 20558525]

約数ペア:

[(1, 20558525), (5, 4111705), (13, 1581425), (17, 1209325), (25, 822341), (61, 337025), (65, 316285), (85, 241865), (221, 93025), (305, 67405), (325, 63257), (425, 48373), (793, 25925), (1037, 19825), (1105, 18605), (1525, 13481), (3721, 5525), (3965, 5185)]