19887160

素因数分解:

$2^3\times 5^1\times {\mathrm{541}}^1\times {\mathrm{919}}^1$

素因数の和:1471

約数の個数: 32

約数和(自身を含む): 44877600

約数和(自身を除く): 24990440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 541, 919, 1082, 1838, 2164, 2705, 3676, 4328, 4595, 5410, 7352, 9190, 10820, 18380, 21640, 36760, 497179, 994358, 1988716, 2485895, 3977432, 4971790, 9943580, 19887160]

約数ペア:

[(1, 19887160), (2, 9943580), (4, 4971790), (5, 3977432), (8, 2485895), (10, 1988716), (20, 994358), (40, 497179), (541, 36760), (919, 21640), (1082, 18380), (1838, 10820), (2164, 9190), (2705, 7352), (3676, 5410), (4328, 4595)]