21261980

素因数分解:

$2^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{14563}}^1$

素因数の和:14645

約数の個数: 24

約数和(自身を含む): 45264912

約数和(自身を除く): 24002932

約数列:

[1, 2, 4, 5, 10, 20, 73, 146, 292, 365, 730, 1460, 14563, 29126, 58252, 72815, 145630, 291260, 1063099, 2126198, 4252396, 5315495, 10630990, 21261980]

約数ペア:

[(1, 21261980), (2, 10630990), (4, 5315495), (5, 4252396), (10, 2126198), (20, 1063099), (73, 291260), (146, 145630), (292, 72815), (365, 58252), (730, 29126), (1460, 14563)]