21115991

素因数分解:

${\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{151}}^1\times {\mathrm{347}}^1$

素因数の和:542

約数の個数: 16

約数和(自身を含む): 23697408

約数和(自身を除く): 2581417

約数列:

[1, 13, 31, 151, 347, 403, 1963, 4511, 4681, 10757, 52397, 60853, 139841, 681161, 1624307, 21115991]

約数ペア:

[(1, 21115991), (13, 1624307), (31, 681161), (151, 139841), (347, 60853), (403, 52397), (1963, 10757), (4511, 4681)]