18981325

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{3001}}^1$

素因数の和:3045

約数の個数: 24

約数和(自身を含む): 26801856

約数和(自身を除く): 7820531

約数列:

[1, 5, 11, 23, 25, 55, 115, 253, 275, 575, 1265, 3001, 6325, 15005, 33011, 69023, 75025, 165055, 345115, 759253, 825275, 1725575, 3796265, 18981325]

約数ペア:

[(1, 18981325), (5, 3796265), (11, 1725575), (23, 825275), (25, 759253), (55, 345115), (115, 165055), (253, 75025), (275, 69023), (575, 33011), (1265, 15005), (3001, 6325)]