19786880

素因数分解:

$2^7\times 5^1\times {\mathrm{43}}^1\times {\mathrm{719}}^1$

素因数の和:781

約数の個数: 64

約数和(自身を含む): 48470400

約数和(自身を除く): 28683520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 43, 64, 80, 86, 128, 160, 172, 215, 320, 344, 430, 640, 688, 719, 860, 1376, 1438, 1720, 2752, 2876, 3440, 3595, 5504, 5752, 6880, 7190, 11504, 13760, 14380, 23008, 27520, 28760, 30917, 46016, 57520, 61834, 92032, 115040, 123668, 154585, 230080, 247336, 309170, 460160, 494672, 618340, 989344, 1236680, 1978688, 2473360, 3957376, 4946720, 9893440, 19786880]

約数ペア:

[(1, 19786880), (2, 9893440), (4, 4946720), (5, 3957376), (8, 2473360), (10, 1978688), (16, 1236680), (20, 989344), (32, 618340), (40, 494672), (43, 460160), (64, 309170), (80, 247336), (86, 230080), (128, 154585), (160, 123668), (172, 115040), (215, 92032), (320, 61834), (344, 57520), (430, 46016), (640, 30917), (688, 28760), (719, 27520), (860, 23008), (1376, 14380), (1438, 13760), (1720, 11504), (2752, 7190), (2876, 6880), (3440, 5752), (3595, 5504)]