19870360

素因数分解:

$2^3\times 5^1\times {\mathrm{457}}^1\times {\mathrm{1087}}^1$

素因数の和:1555

約数の個数: 32

約数和(自身を含む): 44847360

約数和(自身を除く): 24977000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 457, 914, 1087, 1828, 2174, 2285, 3656, 4348, 4570, 5435, 8696, 9140, 10870, 18280, 21740, 43480, 496759, 993518, 1987036, 2483795, 3974072, 4967590, 9935180, 19870360]

約数ペア:

[(1, 19870360), (2, 9935180), (4, 4967590), (5, 3974072), (8, 2483795), (10, 1987036), (20, 993518), (40, 496759), (457, 43480), (914, 21740), (1087, 18280), (1828, 10870), (2174, 9140), (2285, 8696), (3656, 5435), (4348, 4570)]