21171753

素因数分解:

$3^3\times {\mathrm{23}}^1\times {\mathrm{103}}^1\times {\mathrm{331}}^1$

素因数の和:466

約数の個数: 32

約数和(自身を含む): 33146880

約数和(自身を除く): 11975127

約数列:

[1, 3, 9, 23, 27, 69, 103, 207, 309, 331, 621, 927, 993, 2369, 2781, 2979, 7107, 7613, 8937, 21321, 22839, 34093, 63963, 68517, 102279, 205551, 306837, 784139, 920511, 2352417, 7057251, 21171753]

約数ペア:

[(1, 21171753), (3, 7057251), (9, 2352417), (23, 920511), (27, 784139), (69, 306837), (103, 205551), (207, 102279), (309, 68517), (331, 63963), (621, 34093), (927, 22839), (993, 21321), (2369, 8937), (2781, 7613), (2979, 7107)]