638804740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{29063}}^1$

素因数の和:29236

約数の個数: 48

約数和(自身を含む): 1542949632

約数和(自身を除く): 904144892

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 157, 314, 628, 785, 1099, 1570, 2198, 3140, 4396, 5495, 10990, 21980, 29063, 58126, 116252, 145315, 203441, 290630, 406882, 581260, 813764, 1017205, 2034410, 4068820, 4562891, 9125782, 18251564, 22814455, 31940237, 45628910, 63880474, 91257820, 127760948, 159701185, 319402370, 638804740]

約数ペア:

[(1, 638804740), (2, 319402370), (4, 159701185), (5, 127760948), (7, 91257820), (10, 63880474), (14, 45628910), (20, 31940237), (28, 22814455), (35, 18251564), (70, 9125782), (140, 4562891), (157, 4068820), (314, 2034410), (628, 1017205), (785, 813764), (1099, 581260), (1570, 406882), (2198, 290630), (3140, 203441), (4396, 145315), (5495, 116252), (10990, 58126), (21980, 29063)]