20843720

素因数分解:

$2^3\times 5^1\times {\mathrm{439}}^1\times {\mathrm{1187}}^1$

素因数の和:1637

約数の個数: 32

約数和(自身を含む): 47044800

約数和(自身を除く): 26201080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 439, 878, 1187, 1756, 2195, 2374, 3512, 4390, 4748, 5935, 8780, 9496, 11870, 17560, 23740, 47480, 521093, 1042186, 2084372, 2605465, 4168744, 5210930, 10421860, 20843720]

約数ペア:

[(1, 20843720), (2, 10421860), (4, 5210930), (5, 4168744), (8, 2605465), (10, 2084372), (20, 1042186), (40, 521093), (439, 47480), (878, 23740), (1187, 17560), (1756, 11870), (2195, 9496), (2374, 8780), (3512, 5935), (4390, 4748)]