21801505

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{389}}^1\times {\mathrm{1019}}^1$

素因数の和:1424

約数の個数: 16

約数和(自身を含む): 28641600

約数和(自身を除く): 6840095

約数列:

[1, 5, 11, 55, 389, 1019, 1945, 4279, 5095, 11209, 21395, 56045, 396391, 1981955, 4360301, 21801505]

約数ペア:

[(1, 21801505), (5, 4360301), (11, 1981955), (55, 396391), (389, 56045), (1019, 21395), (1945, 11209), (4279, 5095)]