20438540

素因数分解:

$2^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{13999}}^1$

素因数の和:14081

約数の個数: 24

約数和(自身を含む): 43512000

約数和(自身を除く): 23073460

約数列:

[1, 2, 4, 5, 10, 20, 73, 146, 292, 365, 730, 1460, 13999, 27998, 55996, 69995, 139990, 279980, 1021927, 2043854, 4087708, 5109635, 10219270, 20438540]

約数ペア:

[(1, 20438540), (2, 10219270), (4, 5109635), (5, 4087708), (10, 2043854), (20, 1021927), (73, 279980), (146, 139990), (292, 69995), (365, 55996), (730, 27998), (1460, 13999)]