21617080

素因数分解:

$2^3\times 5^1\times {\mathrm{277}}^1\times {\mathrm{1951}}^1$

素因数の和:2239

約数の個数: 32

約数和(自身を含む): 48839040

約数和(自身を除く): 27221960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 277, 554, 1108, 1385, 1951, 2216, 2770, 3902, 5540, 7804, 9755, 11080, 15608, 19510, 39020, 78040, 540427, 1080854, 2161708, 2702135, 4323416, 5404270, 10808540, 21617080]

約数ペア:

[(1, 21617080), (2, 10808540), (4, 5404270), (5, 4323416), (8, 2702135), (10, 2161708), (20, 1080854), (40, 540427), (277, 78040), (554, 39020), (1108, 19510), (1385, 15608), (1951, 11080), (2216, 9755), (2770, 7804), (3902, 5540)]