21640550

素因数分解:

$2^1\times 5^2\times {\mathrm{443}}^1\times {\mathrm{977}}^1$

素因数の和:1432

約数の個数: 24

約数和(自身を含む): 40383576

約数和(自身を除く): 18743026

約数列:

[1, 2, 5, 10, 25, 50, 443, 886, 977, 1954, 2215, 4430, 4885, 9770, 11075, 22150, 24425, 48850, 432811, 865622, 2164055, 4328110, 10820275, 21640550]

約数ペア:

[(1, 21640550), (2, 10820275), (5, 4328110), (10, 2164055), (25, 865622), (50, 432811), (443, 48850), (886, 24425), (977, 22150), (1954, 11075), (2215, 9770), (4430, 4885)]