20811916

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{251}}^1\times {\mathrm{1091}}^1$

素因数の和:1365

約数の個数: 24

約数和(自身を含む): 38525760

約数和(自身を除く): 17713844

約数列:

[1, 2, 4, 19, 38, 76, 251, 502, 1004, 1091, 2182, 4364, 4769, 9538, 19076, 20729, 41458, 82916, 273841, 547682, 1095364, 5202979, 10405958, 20811916]

約数ペア:

[(1, 20811916), (2, 10405958), (4, 5202979), (19, 1095364), (38, 547682), (76, 273841), (251, 82916), (502, 41458), (1004, 20729), (1091, 19076), (2182, 9538), (4364, 4769)]