21000452

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{239}}^1\times {\mathrm{1997}}^1$

素因数の和:2251

約数の個数: 24

約数和(自身を含む): 40279680

約数和(自身を除く): 19279228

約数列:

[1, 2, 4, 11, 22, 44, 239, 478, 956, 1997, 2629, 3994, 5258, 7988, 10516, 21967, 43934, 87868, 477283, 954566, 1909132, 5250113, 10500226, 21000452]

約数ペア:

[(1, 21000452), (2, 10500226), (4, 5250113), (11, 1909132), (22, 954566), (44, 477283), (239, 87868), (478, 43934), (956, 21967), (1997, 10516), (2629, 7988), (3994, 5258)]