19802980

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{21067}}^1$

素因数の和:21123

約数の個数: 24

約数和(自身を含む): 42473088

約数和(自身を除く): 22670108

約数列:

[1, 2, 4, 5, 10, 20, 47, 94, 188, 235, 470, 940, 21067, 42134, 84268, 105335, 210670, 421340, 990149, 1980298, 3960596, 4950745, 9901490, 19802980]

約数ペア:

[(1, 19802980), (2, 9901490), (4, 4950745), (5, 3960596), (10, 1980298), (20, 990149), (47, 421340), (94, 210670), (188, 105335), (235, 84268), (470, 42134), (940, 21067)]