18719660

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{109}}^1\times {\mathrm{277}}^1$

素因数の和:426

約数の個数: 48

約数和(自身を含む): 41099520

約数和(自身を除く): 22379860

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 109, 124, 155, 218, 277, 310, 436, 545, 554, 620, 1090, 1108, 1385, 2180, 2770, 3379, 5540, 6758, 8587, 13516, 16895, 17174, 30193, 33790, 34348, 42935, 60386, 67580, 85870, 120772, 150965, 171740, 301930, 603860, 935983, 1871966, 3743932, 4679915, 9359830, 18719660]

約数ペア:

[(1, 18719660), (2, 9359830), (4, 4679915), (5, 3743932), (10, 1871966), (20, 935983), (31, 603860), (62, 301930), (109, 171740), (124, 150965), (155, 120772), (218, 85870), (277, 67580), (310, 60386), (436, 42935), (545, 34348), (554, 33790), (620, 30193), (1090, 17174), (1108, 16895), (1385, 13516), (2180, 8587), (2770, 6758), (3379, 5540)]