21202640

素因数分解:

$2^4\times 5^1\times {\mathrm{47}}^1\times {\mathrm{5639}}^1$

素因数の和:5699

約数の個数: 40

約数和(自身を含む): 50353920

約数和(自身を除く): 29151280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 47, 80, 94, 188, 235, 376, 470, 752, 940, 1880, 3760, 5639, 11278, 22556, 28195, 45112, 56390, 90224, 112780, 225560, 265033, 451120, 530066, 1060132, 1325165, 2120264, 2650330, 4240528, 5300660, 10601320, 21202640]

約数ペア:

[(1, 21202640), (2, 10601320), (4, 5300660), (5, 4240528), (8, 2650330), (10, 2120264), (16, 1325165), (20, 1060132), (40, 530066), (47, 451120), (80, 265033), (94, 225560), (188, 112780), (235, 90224), (376, 56390), (470, 45112), (752, 28195), (940, 22556), (1880, 11278), (3760, 5639)]