19990220

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43457}}^1$

素因数の和:43489

約数の個数: 24

約数和(自身を含む): 43805664

約数和(自身を除く): 23815444

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 115, 230, 460, 43457, 86914, 173828, 217285, 434570, 869140, 999511, 1999022, 3998044, 4997555, 9995110, 19990220]

約数ペア:

[(1, 19990220), (2, 9995110), (4, 4997555), (5, 3998044), (10, 1999022), (20, 999511), (23, 869140), (46, 434570), (92, 217285), (115, 173828), (230, 86914), (460, 43457)]