20438890

素因数分解:

$2^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{43487}}^1$

素因数の和:43541

約数の個数: 16

約数和(自身を含む): 37573632

約数和(自身を除く): 17134742

約数列:

[1, 2, 5, 10, 47, 94, 235, 470, 43487, 86974, 217435, 434870, 2043889, 4087778, 10219445, 20438890]

約数ペア:

[(1, 20438890), (2, 10219445), (5, 4087778), (10, 2043889), (47, 434870), (94, 217435), (235, 86974), (470, 43487)]