18985550

素因数分解:

$2^1\times 5^2\times {\mathrm{431}}^1\times {\mathrm{881}}^1$

素因数の和:1324

約数の個数: 24

約数和(自身を含む): 35435232

約数和(自身を除く): 16449682

約数列:

[1, 2, 5, 10, 25, 50, 431, 862, 881, 1762, 2155, 4310, 4405, 8810, 10775, 21550, 22025, 44050, 379711, 759422, 1898555, 3797110, 9492775, 18985550]

約数ペア:

[(1, 18985550), (2, 9492775), (5, 3797110), (10, 1898555), (25, 759422), (50, 379711), (431, 44050), (862, 22025), (881, 21550), (1762, 10775), (2155, 8810), (4310, 4405)]