21501790

素因数分解:

$2^1\times 5^1\times {\mathrm{1009}}^1\times {\mathrm{2131}}^1$

素因数の和:3147

約数の個数: 16

約数和(自身を含む): 38759760

約数和(自身を除く): 17257970

約数列:

[1, 2, 5, 10, 1009, 2018, 2131, 4262, 5045, 10090, 10655, 21310, 2150179, 4300358, 10750895, 21501790]

約数ペア:

[(1, 21501790), (2, 10750895), (5, 4300358), (10, 2150179), (1009, 21310), (2018, 10655), (2131, 10090), (4262, 5045)]