21478678

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{10457}}^1$

素因数の和:10551

約数の個数: 16

約数和(自身を含む): 35138880

約数和(自身を除く): 13660202

約数列:

[1, 2, 13, 26, 79, 158, 1027, 2054, 10457, 20914, 135941, 271882, 826103, 1652206, 10739339, 21478678]

約数ペア:

[(1, 21478678), (2, 10739339), (13, 1652206), (26, 826103), (79, 271882), (158, 135941), (1027, 20914), (2054, 10457)]