21994609

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{12721}}^1$

素因数の和:12760

約数の個数: 16

約数和(自身を含む): 28497280

約数和(自身を除く): 6502671

約数列:

[1, 7, 13, 19, 91, 133, 247, 1729, 12721, 89047, 165373, 241699, 1157611, 1691893, 3142087, 21994609]

約数ペア:

[(1, 21994609), (7, 3142087), (13, 1691893), (19, 1157611), (91, 241699), (133, 165373), (247, 89047), (1729, 12721)]