19947748

素因数分解:

$2^2\times {\mathrm{89}}^1\times {\mathrm{137}}^1\times {\mathrm{409}}^1$

素因数の和:639

約数の個数: 24

約数和(自身を含む): 35645400

約数和(自身を除く): 15697652

約数列:

[1, 2, 4, 89, 137, 178, 274, 356, 409, 548, 818, 1636, 12193, 24386, 36401, 48772, 56033, 72802, 112066, 145604, 224132, 4986937, 9973874, 19947748]

約数ペア:

[(1, 19947748), (2, 9973874), (4, 4986937), (89, 224132), (137, 145604), (178, 112066), (274, 72802), (356, 56033), (409, 48772), (548, 36401), (818, 24386), (1636, 12193)]