21210890

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{73141}}^1$

素因数の和:73177

約数の個数: 16

約数和(自身を含む): 39496680

約数和(自身を除く): 18285790

約数列:

[1, 2, 5, 10, 29, 58, 145, 290, 73141, 146282, 365705, 731410, 2121089, 4242178, 10605445, 21210890]

約数ペア:

[(1, 21210890), (2, 10605445), (5, 4242178), (10, 2121089), (29, 731410), (58, 365705), (145, 146282), (290, 73141)]