280054420

素因数分解:

$2^2\times 5^1\times {\mathrm{131}}^1\times {\mathrm{139}}^1\times {\mathrm{769}}^1$

素因数の和:1048

約数の個数: 48

約数和(自身を含む): 597643200

約数和(自身を除く): 317588780

約数列:

[1, 2, 4, 5, 10, 20, 131, 139, 262, 278, 524, 556, 655, 695, 769, 1310, 1390, 1538, 2620, 2780, 3076, 3845, 7690, 15380, 18209, 36418, 72836, 91045, 100739, 106891, 182090, 201478, 213782, 364180, 402956, 427564, 503695, 534455, 1007390, 1068910, 2014780, 2137820, 14002721, 28005442, 56010884, 70013605, 140027210, 280054420]

約数ペア:

[(1, 280054420), (2, 140027210), (4, 70013605), (5, 56010884), (10, 28005442), (20, 14002721), (131, 2137820), (139, 2014780), (262, 1068910), (278, 1007390), (524, 534455), (556, 503695), (655, 427564), (695, 402956), (769, 364180), (1310, 213782), (1390, 201478), (1538, 182090), (2620, 106891), (2780, 100739), (3076, 91045), (3845, 72836), (7690, 36418), (15380, 18209)]