21289455

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{1049}}^1$

素因数の和:1112

約数の個数: 48

約数和(自身を含む): 41277600

約数和(自身を除く): 19988145

約数列:

[1, 3, 5, 9, 11, 15, 33, 41, 45, 55, 99, 123, 165, 205, 369, 451, 495, 615, 1049, 1353, 1845, 2255, 3147, 4059, 5245, 6765, 9441, 11539, 15735, 20295, 34617, 43009, 47205, 57695, 103851, 129027, 173085, 215045, 387081, 473099, 519255, 645135, 1419297, 1935405, 2365495, 4257891, 7096485, 21289455]

約数ペア:

[(1, 21289455), (3, 7096485), (5, 4257891), (9, 2365495), (11, 1935405), (15, 1419297), (33, 645135), (41, 519255), (45, 473099), (55, 387081), (99, 215045), (123, 173085), (165, 129027), (205, 103851), (369, 57695), (451, 47205), (495, 43009), (615, 34617), (1049, 20295), (1353, 15735), (1845, 11539), (2255, 9441), (3147, 6765), (4059, 5245)]