20999018

素因数分解:

$2^1\times {\mathrm{197}}^1\times {\mathrm{223}}^1\times {\mathrm{239}}^1$

素因数の和:661

約数の個数: 16

約数和(自身を含む): 31933440

約数和(自身を除く): 10934422

約数列:

[1, 2, 197, 223, 239, 394, 446, 478, 43931, 47083, 53297, 87862, 94166, 106594, 10499509, 20999018]

約数ペア:

[(1, 20999018), (2, 10499509), (197, 106594), (223, 94166), (239, 87862), (394, 53297), (446, 47083), (478, 43931)]