21491987

素因数分解:

${\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{757}}^1$

素因数の和:886

約数の個数: 16

約数和(自身を含む): 24559200

約数和(自身を除く): 3067213

約数列:

[1, 11, 29, 89, 319, 757, 979, 2581, 8327, 21953, 28391, 67373, 241483, 741103, 1953817, 21491987]

約数ペア:

[(1, 21491987), (11, 1953817), (29, 741103), (89, 241483), (319, 67373), (757, 28391), (979, 21953), (2581, 8327)]