399967678

素因数分解:

$2^1\times {\mathrm{11}}^2\times {\mathrm{79}}^1\times {\mathrm{20921}}^1$

素因数の和:21024

約数の個数: 24

約数和(自身を含む): 667830240

約数和(自身を除く): 267862562

約数列:

[1, 2, 11, 22, 79, 121, 158, 242, 869, 1738, 9559, 19118, 20921, 41842, 230131, 460262, 1652759, 2531441, 3305518, 5062882, 18180349, 36360698, 199983839, 399967678]

約数ペア:

[(1, 399967678), (2, 199983839), (11, 36360698), (22, 18180349), (79, 5062882), (121, 3305518), (158, 2531441), (242, 1652759), (869, 460262), (1738, 230131), (9559, 41842), (19118, 20921)]