21123860

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{62129}}^1$

素因数の和:62155

約数の個数: 24

約数和(自身を含む): 46970280

約数和(自身を除く): 25846420

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 62129, 124258, 248516, 310645, 621290, 1056193, 1242580, 2112386, 4224772, 5280965, 10561930, 21123860]

約数ペア:

[(1, 21123860), (2, 10561930), (4, 5280965), (5, 4224772), (10, 2112386), (17, 1242580), (20, 1056193), (34, 621290), (68, 310645), (85, 248516), (170, 124258), (340, 62129)]