21228890

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{111731}}^1$

素因数の和:111757

約数の個数: 16

約数和(自身を含む): 40223520

約数和(自身を除く): 18994630

約数列:

[1, 2, 5, 10, 19, 38, 95, 190, 111731, 223462, 558655, 1117310, 2122889, 4245778, 10614445, 21228890]

約数ペア:

[(1, 21228890), (2, 10614445), (5, 4245778), (10, 2122889), (19, 1117310), (38, 558655), (95, 223462), (190, 111731)]