21365665

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{307}}^1\times {\mathrm{449}}^1$

素因数の和:792

約数の個数: 16

約数和(自身を含む): 26611200

約数和(自身を除く): 5245535

約数列:

[1, 5, 31, 155, 307, 449, 1535, 2245, 9517, 13919, 47585, 69595, 137843, 689215, 4273133, 21365665]

約数ペア:

[(1, 21365665), (5, 4273133), (31, 689215), (155, 137843), (307, 69595), (449, 47585), (1535, 13919), (2245, 9517)]