16620928821

素因数分解:

$3^2\times 7^2\times {\mathrm{37689181}}^1$

素因数の和:37689201

約数の個数: 18

約数和(自身を含む): 27927683862

約数和(自身を除く): 11306755041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 37689181, 113067543, 263824267, 339202629, 791472801, 1846769869, 2374418403, 5540309607, 16620928821]

約数ペア:

[(1, 16620928821), (3, 5540309607), (7, 2374418403), (9, 1846769869), (21, 791472801), (49, 339202629), (63, 263824267), (147, 113067543), (441, 37689181)]