20989982

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{11059}}^1$

素因数の和:11147

約数の個数: 16

約数和(自身を含む): 34374480

約数和(自身を除く): 13384498

約数列:

[1, 2, 13, 26, 73, 146, 949, 1898, 11059, 22118, 143767, 287534, 807307, 1614614, 10494991, 20989982]

約数ペア:

[(1, 20989982), (2, 10494991), (13, 1614614), (26, 807307), (73, 287534), (146, 143767), (949, 22118), (1898, 11059)]