21287825

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{3853}}^1$

素因数の和:3893

約数の個数: 24

約数和(自身を含む): 30107448

約数和(自身を除く): 8819623

約数列:

[1, 5, 13, 17, 25, 65, 85, 221, 325, 425, 1105, 3853, 5525, 19265, 50089, 65501, 96325, 250445, 327505, 851513, 1252225, 1637525, 4257565, 21287825]

約数ペア:

[(1, 21287825), (5, 4257565), (13, 1637525), (17, 1252225), (25, 851513), (65, 327505), (85, 250445), (221, 96325), (325, 65501), (425, 50089), (1105, 19265), (3853, 5525)]