20621878

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{661}}^1\times {\mathrm{821}}^1$

素因数の和:1503

約数の個数: 16

約数和(自身を含む): 32649840

約数和(自身を除く): 12027962

約数列:

[1, 2, 19, 38, 661, 821, 1322, 1642, 12559, 15599, 25118, 31198, 542681, 1085362, 10310939, 20621878]

約数ペア:

[(1, 20621878), (2, 10310939), (19, 1085362), (38, 542681), (661, 31198), (821, 25118), (1322, 15599), (1642, 12559)]