19989100

素因数分解:

$2^2\times 5^2\times {\mathrm{47}}^1\times {\mathrm{4253}}^1$

素因数の和:4314

約数の個数: 36

約数和(自身を含む): 44309664

約数和(自身を除く): 24320564

約数列:

[1, 2, 4, 5, 10, 20, 25, 47, 50, 94, 100, 188, 235, 470, 940, 1175, 2350, 4253, 4700, 8506, 17012, 21265, 42530, 85060, 106325, 199891, 212650, 399782, 425300, 799564, 999455, 1998910, 3997820, 4997275, 9994550, 19989100]

約数ペア:

[(1, 19989100), (2, 9994550), (4, 4997275), (5, 3997820), (10, 1998910), (20, 999455), (25, 799564), (47, 425300), (50, 399782), (94, 212650), (100, 199891), (188, 106325), (235, 85060), (470, 42530), (940, 21265), (1175, 17012), (2350, 8506), (4253, 4700)]