21771320

素因数分解:

$2^3\times 5^1\times {\mathrm{719}}^1\times {\mathrm{757}}^1$

素因数の和:1487

約数の個数: 32

約数和(自身を含む): 49118400

約数和(自身を除く): 27347080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 719, 757, 1438, 1514, 2876, 3028, 3595, 3785, 5752, 6056, 7190, 7570, 14380, 15140, 28760, 30280, 544283, 1088566, 2177132, 2721415, 4354264, 5442830, 10885660, 21771320]

約数ペア:

[(1, 21771320), (2, 10885660), (4, 5442830), (5, 4354264), (8, 2721415), (10, 2177132), (20, 1088566), (40, 544283), (719, 30280), (757, 28760), (1438, 15140), (1514, 14380), (2876, 7570), (3028, 7190), (3595, 6056), (3785, 5752)]