21247640

素因数分解:

$2^3\times 5^1\times {\mathrm{283}}^1\times {\mathrm{1877}}^1$

素因数の和:2171

約数の個数: 32

約数和(自身を含む): 48001680

約数和(自身を除く): 26754040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 283, 566, 1132, 1415, 1877, 2264, 2830, 3754, 5660, 7508, 9385, 11320, 15016, 18770, 37540, 75080, 531191, 1062382, 2124764, 2655955, 4249528, 5311910, 10623820, 21247640]

約数ペア:

[(1, 21247640), (2, 10623820), (4, 5311910), (5, 4249528), (8, 2655955), (10, 2124764), (20, 1062382), (40, 531191), (283, 75080), (566, 37540), (1132, 18770), (1415, 15016), (1877, 11320), (2264, 9385), (2830, 7508), (3754, 5660)]