21298953

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{223}}^1$

素因数の和:349

約数の個数: 32

約数和(自身を含む): 32112640

約数和(自身を除く): 10813687

約数列:

[1, 3, 13, 31, 39, 79, 93, 223, 237, 403, 669, 1027, 1209, 2449, 2899, 3081, 6913, 7347, 8697, 17617, 20739, 31837, 52851, 89869, 95511, 229021, 269607, 546127, 687063, 1638381, 7099651, 21298953]

約数ペア:

[(1, 21298953), (3, 7099651), (13, 1638381), (31, 687063), (39, 546127), (79, 269607), (93, 229021), (223, 95511), (237, 89869), (403, 52851), (669, 31837), (1027, 20739), (1209, 17617), (2449, 8697), (2899, 7347), (3081, 6913)]