18968740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{863}}^1$

素因数の和:1036

約数の個数: 48

約数和(自身を含む): 45868032

約数和(自身を除く): 26899292

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 157, 314, 628, 785, 863, 1099, 1570, 1726, 2198, 3140, 3452, 4315, 4396, 5495, 6041, 8630, 10990, 12082, 17260, 21980, 24164, 30205, 60410, 120820, 135491, 270982, 541964, 677455, 948437, 1354910, 1896874, 2709820, 3793748, 4742185, 9484370, 18968740]

約数ペア:

[(1, 18968740), (2, 9484370), (4, 4742185), (5, 3793748), (7, 2709820), (10, 1896874), (14, 1354910), (20, 948437), (28, 677455), (35, 541964), (70, 270982), (140, 135491), (157, 120820), (314, 60410), (628, 30205), (785, 24164), (863, 21980), (1099, 17260), (1570, 12082), (1726, 10990), (2198, 8630), (3140, 6041), (3452, 5495), (4315, 4396)]