8990440

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{5227}}^1$

素因数の和:5281

約数の個数: 32

約数和(自身を含む): 20702880

約数和(自身を除く): 11712440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 5227, 10454, 20908, 26135, 41816, 52270, 104540, 209080, 224761, 449522, 899044, 1123805, 1798088, 2247610, 4495220, 8990440]

約数ペア:

[(1, 8990440), (2, 4495220), (4, 2247610), (5, 1798088), (8, 1123805), (10, 899044), (20, 449522), (40, 224761), (43, 209080), (86, 104540), (172, 52270), (215, 41816), (344, 26135), (430, 20908), (860, 10454), (1720, 5227)]