21257830

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{149}}^1\times {\mathrm{1297}}^1$

素因数の和:1464

約数の個数: 32

約数和(自身を含む): 42055200

約数和(自身を除く): 20797370

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 149, 298, 745, 1297, 1490, 1639, 2594, 3278, 6485, 8195, 12970, 14267, 16390, 28534, 71335, 142670, 193253, 386506, 966265, 1932530, 2125783, 4251566, 10628915, 21257830]

約数ペア:

[(1, 21257830), (2, 10628915), (5, 4251566), (10, 2125783), (11, 1932530), (22, 966265), (55, 386506), (110, 193253), (149, 142670), (298, 71335), (745, 28534), (1297, 16390), (1490, 14267), (1639, 12970), (2594, 8195), (3278, 6485)]