21497416

素因数分解:

$2^3\times {\mathrm{89}}^1\times {\mathrm{109}}^1\times {\mathrm{277}}^1$

素因数の和:481

約数の個数: 32

約数和(自身を含む): 41283000

約数和(自身を除く): 19785584

約数列:

[1, 2, 4, 8, 89, 109, 178, 218, 277, 356, 436, 554, 712, 872, 1108, 2216, 9701, 19402, 24653, 30193, 38804, 49306, 60386, 77608, 98612, 120772, 197224, 241544, 2687177, 5374354, 10748708, 21497416]

約数ペア:

[(1, 21497416), (2, 10748708), (4, 5374354), (8, 2687177), (89, 241544), (109, 197224), (178, 120772), (218, 98612), (277, 77608), (356, 60386), (436, 49306), (554, 38804), (712, 30193), (872, 24653), (1108, 19402), (2216, 9701)]