21368277

素因数分解:

$3^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{89}}^1\times {\mathrm{103}}^1$

素因数の和:242

約数の個数: 48

約数和(自身を含む): 36990720

約数和(自身を除く): 15622443

約数列:

[1, 3, 7, 9, 21, 37, 63, 89, 103, 111, 259, 267, 309, 333, 623, 721, 777, 801, 927, 1869, 2163, 2331, 3293, 3811, 5607, 6489, 9167, 9879, 11433, 23051, 26677, 27501, 29637, 34299, 64169, 69153, 80031, 82503, 192507, 207459, 240093, 339179, 577521, 1017537, 2374253, 3052611, 7122759, 21368277]

約数ペア:

[(1, 21368277), (3, 7122759), (7, 3052611), (9, 2374253), (21, 1017537), (37, 577521), (63, 339179), (89, 240093), (103, 207459), (111, 192507), (259, 82503), (267, 80031), (309, 69153), (333, 64169), (623, 34299), (721, 29637), (777, 27501), (801, 26677), (927, 23051), (1869, 11433), (2163, 9879), (2331, 9167), (3293, 6489), (3811, 5607)]