1640961

素因数分解:

$3^2\times 7^2\times {\mathrm{61}}^2$

素因数の和:142

約数の個数: 27

約数和(自身を含む): 2803203

約数和(自身を除く): 1162242

約数列:

[1, 3, 7, 9, 21, 49, 61, 63, 147, 183, 427, 441, 549, 1281, 2989, 3721, 3843, 8967, 11163, 26047, 26901, 33489, 78141, 182329, 234423, 546987, 1640961]

約数ペア:

[(1, 1640961), (3, 546987), (7, 234423), (9, 182329), (21, 78141), (49, 33489), (61, 26901), (63, 26047), (147, 11163), (183, 8967), (427, 3843), (441, 3721), (549, 2989)]