21293505

素因数分解:

$3^2\times 5^1\times {\mathrm{163}}^1\times {\mathrm{2903}}^1$

素因数の和:3077

約数の個数: 24

約数和(自身を含む): 37147968

約数和(自身を除く): 15854463

約数列:

[1, 3, 5, 9, 15, 45, 163, 489, 815, 1467, 2445, 2903, 7335, 8709, 14515, 26127, 43545, 130635, 473189, 1419567, 2365945, 4258701, 7097835, 21293505]

約数ペア:

[(1, 21293505), (3, 7097835), (5, 4258701), (9, 2365945), (15, 1419567), (45, 473189), (163, 130635), (489, 43545), (815, 26127), (1467, 14515), (2445, 8709), (2903, 7335)]