18969980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{49921}}^1$

素因数の和:49949

約数の個数: 24

約数和(自身を含む): 41934480

約数和(自身を除く): 22964500

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 49921, 99842, 199684, 249605, 499210, 948499, 998420, 1896998, 3793996, 4742495, 9484990, 18969980]

約数ペア:

[(1, 18969980), (2, 9484990), (4, 4742495), (5, 3793996), (10, 1896998), (19, 998420), (20, 948499), (38, 499210), (76, 249605), (95, 199684), (190, 99842), (380, 49921)]