21522520

素因数分解:

$2^3\times 5^1\times {\mathrm{163}}^1\times {\mathrm{3301}}^1$

素因数の和:3475

約数の個数: 32

約数和(自身を含む): 48737520

約数和(自身を除く): 27215000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 163, 326, 652, 815, 1304, 1630, 3260, 3301, 6520, 6602, 13204, 16505, 26408, 33010, 66020, 132040, 538063, 1076126, 2152252, 2690315, 4304504, 5380630, 10761260, 21522520]

約数ペア:

[(1, 21522520), (2, 10761260), (4, 5380630), (5, 4304504), (8, 2690315), (10, 2152252), (20, 1076126), (40, 538063), (163, 132040), (326, 66020), (652, 33010), (815, 26408), (1304, 16505), (1630, 13204), (3260, 6602), (3301, 6520)]