20649741

素因数分解:

$3^1\times 7^1\times {\mathrm{307}}^1\times {\mathrm{3203}}^1$

素因数の和:3520

約数の個数: 16

約数和(自身を含む): 31578624

約数和(自身を除く): 10928883

約数列:

[1, 3, 7, 21, 307, 921, 2149, 3203, 6447, 9609, 22421, 67263, 983321, 2949963, 6883247, 20649741]

約数ペア:

[(1, 20649741), (3, 6883247), (7, 2949963), (21, 983321), (307, 67263), (921, 22421), (2149, 9609), (3203, 6447)]