21489028

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{191}}^1\times {\mathrm{2557}}^1$

素因数の和:2763

約数の個数: 24

約数和(自身を含む): 41255424

約数和(自身を除く): 19766396

約数列:

[1, 2, 4, 11, 22, 44, 191, 382, 764, 2101, 2557, 4202, 5114, 8404, 10228, 28127, 56254, 112508, 488387, 976774, 1953548, 5372257, 10744514, 21489028]

約数ペア:

[(1, 21489028), (2, 10744514), (4, 5372257), (11, 1953548), (22, 976774), (44, 488387), (191, 112508), (382, 56254), (764, 28127), (2101, 10228), (2557, 8404), (4202, 5114)]