19812680

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{11519}}^1$

素因数の和:11573

約数の個数: 32

約数和(自身を含む): 45619200

約数和(自身を除く): 25806520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 11519, 23038, 46076, 57595, 92152, 115190, 230380, 460760, 495317, 990634, 1981268, 2476585, 3962536, 4953170, 9906340, 19812680]

約数ペア:

[(1, 19812680), (2, 9906340), (4, 4953170), (5, 3962536), (8, 2476585), (10, 1981268), (20, 990634), (40, 495317), (43, 460760), (86, 230380), (172, 115190), (215, 92152), (344, 57595), (430, 46076), (860, 23038), (1720, 11519)]