21340679

素因数分解:

${\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{97}}^1\times {\mathrm{151}}^1$

素因数の和:326

約数の個数: 16

約数和(自身を含む): 22880256

約数和(自身を除く): 1539577

約数列:

[1, 31, 47, 97, 151, 1457, 3007, 4559, 4681, 7097, 14647, 141329, 220007, 454057, 688409, 21340679]

約数ペア:

[(1, 21340679), (31, 688409), (47, 454057), (97, 220007), (151, 141329), (1457, 14647), (3007, 7097), (4559, 4681)]