19338820

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{113}}^1\times {\mathrm{199}}^1$

素因数の和:364

約数の個数: 48

約数和(自身を含む): 42134400

約数和(自身を除く): 22795580

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 113, 172, 199, 215, 226, 398, 430, 452, 565, 796, 860, 995, 1130, 1990, 2260, 3980, 4859, 8557, 9718, 17114, 19436, 22487, 24295, 34228, 42785, 44974, 48590, 85570, 89948, 97180, 112435, 171140, 224870, 449740, 966941, 1933882, 3867764, 4834705, 9669410, 19338820]

約数ペア:

[(1, 19338820), (2, 9669410), (4, 4834705), (5, 3867764), (10, 1933882), (20, 966941), (43, 449740), (86, 224870), (113, 171140), (172, 112435), (199, 97180), (215, 89948), (226, 85570), (398, 48590), (430, 44974), (452, 42785), (565, 34228), (796, 24295), (860, 22487), (995, 19436), (1130, 17114), (1990, 9718), (2260, 8557), (3980, 4859)]