21430409

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{271}}^1$

素因数の和:381

約数の個数: 32

約数和(自身を含む): 29245440

約数和(自身を除く): 7815031

約数列:

[1, 7, 11, 13, 77, 79, 91, 143, 271, 553, 869, 1001, 1027, 1897, 2981, 3523, 6083, 7189, 11297, 20867, 21409, 24661, 38753, 79079, 149863, 235499, 271271, 278317, 1648493, 1948219, 3061487, 21430409]

約数ペア:

[(1, 21430409), (7, 3061487), (11, 1948219), (13, 1648493), (77, 278317), (79, 271271), (91, 235499), (143, 149863), (271, 79079), (553, 38753), (869, 24661), (1001, 21409), (1027, 20867), (1897, 11297), (2981, 7189), (3523, 6083)]