21557740

素因数分解:

$2^2\times 5^1\times {\mathrm{863}}^1\times {\mathrm{1249}}^1$

素因数の和:2121

約数の個数: 24

約数和(自身を含む): 45360000

約数和(自身を除く): 23802260

約数列:

[1, 2, 4, 5, 10, 20, 863, 1249, 1726, 2498, 3452, 4315, 4996, 6245, 8630, 12490, 17260, 24980, 1077887, 2155774, 4311548, 5389435, 10778870, 21557740]

約数ペア:

[(1, 21557740), (2, 10778870), (4, 5389435), (5, 4311548), (10, 2155774), (20, 1077887), (863, 24980), (1249, 17260), (1726, 12490), (2498, 8630), (3452, 6245), (4315, 4996)]