18812840

素因数分解:

$2^3\times 5^1\times {\mathrm{137}}^1\times {\mathrm{3433}}^1$

素因数の和:3581

約数の個数: 32

約数和(自身を含む): 42650280

約数和(自身を除く): 23837440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 137, 274, 548, 685, 1096, 1370, 2740, 3433, 5480, 6866, 13732, 17165, 27464, 34330, 68660, 137320, 470321, 940642, 1881284, 2351605, 3762568, 4703210, 9406420, 18812840]

約数ペア:

[(1, 18812840), (2, 9406420), (4, 4703210), (5, 3762568), (8, 2351605), (10, 1881284), (20, 940642), (40, 470321), (137, 137320), (274, 68660), (548, 34330), (685, 27464), (1096, 17165), (1370, 13732), (2740, 6866), (3433, 5480)]