20917540

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{149411}}^1$

素因数の和:149427

約数の個数: 24

約数和(自身を含む): 50202432

約数和(自身を除く): 29284892

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 149411, 298822, 597644, 747055, 1045877, 1494110, 2091754, 2988220, 4183508, 5229385, 10458770, 20917540]

約数ペア:

[(1, 20917540), (2, 10458770), (4, 5229385), (5, 4183508), (7, 2988220), (10, 2091754), (14, 1494110), (20, 1045877), (28, 747055), (35, 597644), (70, 298822), (140, 149411)]