21280055

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{3413}}^1$

素因数の和:3490

約数の個数: 16

約数和(自身を含む): 27038880

約数和(自身を除く): 5758825

約数列:

[1, 5, 29, 43, 145, 215, 1247, 3413, 6235, 17065, 98977, 146759, 494885, 733795, 4256011, 21280055]

約数ペア:

[(1, 21280055), (5, 4256011), (29, 733795), (43, 494885), (145, 146759), (215, 98977), (1247, 17065), (3413, 6235)]