21131017

素因数分解:

${\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{137}}^1\times {\mathrm{211}}^1$

素因数の和:408

約数の個数: 16

約数和(自身を含む): 23170752

約数和(自身を除く): 2039735

約数列:

[1, 17, 43, 137, 211, 731, 2329, 3587, 5891, 9073, 28907, 100147, 154241, 491419, 1243001, 21131017]

約数ペア:

[(1, 21131017), (17, 1243001), (43, 491419), (137, 154241), (211, 100147), (731, 28907), (2329, 9073), (3587, 5891)]