281588980

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{199}}^1\times {\mathrm{509}}^1$

素因数の和:856

約数の個数: 48

約数和(自身を含む): 599760000

約数和(自身を除く): 318171020

約数列:

[1, 2, 4, 5, 10, 20, 139, 199, 278, 398, 509, 556, 695, 796, 995, 1018, 1390, 1990, 2036, 2545, 2780, 3980, 5090, 10180, 27661, 55322, 70751, 101291, 110644, 138305, 141502, 202582, 276610, 283004, 353755, 405164, 506455, 553220, 707510, 1012910, 1415020, 2025820, 14079449, 28158898, 56317796, 70397245, 140794490, 281588980]

約数ペア:

[(1, 281588980), (2, 140794490), (4, 70397245), (5, 56317796), (10, 28158898), (20, 14079449), (139, 2025820), (199, 1415020), (278, 1012910), (398, 707510), (509, 553220), (556, 506455), (695, 405164), (796, 353755), (995, 283004), (1018, 276610), (1390, 202582), (1990, 141502), (2036, 138305), (2545, 110644), (2780, 101291), (3980, 70751), (5090, 55322), (10180, 27661)]