21561718

素因数分解:

$2^1\times {\mathrm{23}}^1\times {\mathrm{73}}^1\times {\mathrm{6421}}^1$

素因数の和:6519

約数の個数: 16

約数和(自身を含む): 34216416

約数和(自身を除く): 12654698

約数列:

[1, 2, 23, 46, 73, 146, 1679, 3358, 6421, 12842, 147683, 295366, 468733, 937466, 10780859, 21561718]

約数ペア:

[(1, 21561718), (2, 10780859), (23, 937466), (46, 468733), (73, 295366), (146, 147683), (1679, 12842), (3358, 6421)]