9780221

素因数分解:

${\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1$

素因数の和:137

約数の個数: 32

約数和(自身を含む): 12165120

約数和(自身を除く): 2384899

約数列:

[1, 11, 23, 29, 31, 43, 253, 319, 341, 473, 667, 713, 899, 989, 1247, 1333, 7337, 7843, 9889, 10879, 13717, 14663, 20677, 28681, 30659, 38657, 227447, 315491, 337249, 425227, 889111, 9780221]

約数ペア:

[(1, 9780221), (11, 889111), (23, 425227), (29, 337249), (31, 315491), (43, 227447), (253, 38657), (319, 30659), (341, 28681), (473, 20677), (667, 14663), (713, 13717), (899, 10879), (989, 9889), (1247, 7843), (1333, 7337)]