19887580

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{21157}}^1$

素因数の和:21213

約数の個数: 24

約数和(自身を含む): 42654528

約数和(自身を除く): 22766948

約数列:

[1, 2, 4, 5, 10, 20, 47, 94, 188, 235, 470, 940, 21157, 42314, 84628, 105785, 211570, 423140, 994379, 1988758, 3977516, 4971895, 9943790, 19887580]

約数ペア:

[(1, 19887580), (2, 9943790), (4, 4971895), (5, 3977516), (10, 1988758), (20, 994379), (47, 423140), (94, 211570), (188, 105785), (235, 84628), (470, 42314), (940, 21157)]