20990812

素因数分解:

$2^2\times {\mathrm{23}}^1\times {\mathrm{151}}^1\times {\mathrm{1511}}^1$

素因数の和:1689

約数の個数: 24

約数和(自身を含む): 38610432

約数和(自身を除く): 17619620

約数列:

[1, 2, 4, 23, 46, 92, 151, 302, 604, 1511, 3022, 3473, 6044, 6946, 13892, 34753, 69506, 139012, 228161, 456322, 912644, 5247703, 10495406, 20990812]

約数ペア:

[(1, 20990812), (2, 10495406), (4, 5247703), (23, 912644), (46, 456322), (92, 228161), (151, 139012), (302, 69506), (604, 34753), (1511, 13892), (3022, 6946), (3473, 6044)]