21578205

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{6883}}^1$

素因数の和:6921

約数の個数: 32

約数和(自身を含む): 39651840

約数和(自身を除く): 18073635

約数列:

[1, 3, 5, 11, 15, 19, 33, 55, 57, 95, 165, 209, 285, 627, 1045, 3135, 6883, 20649, 34415, 75713, 103245, 130777, 227139, 378565, 392331, 653885, 1135695, 1438547, 1961655, 4315641, 7192735, 21578205]

約数ペア:

[(1, 21578205), (3, 7192735), (5, 4315641), (11, 1961655), (15, 1438547), (19, 1135695), (33, 653885), (55, 392331), (57, 378565), (95, 227139), (165, 130777), (209, 103245), (285, 75713), (627, 34415), (1045, 20649), (3135, 6883)]