17980880

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{5227}}^1$

素因数の和:5283

約数の個数: 40

約数和(自身を含む): 42785952

約数和(自身を除く): 24805072

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 688, 860, 1720, 3440, 5227, 10454, 20908, 26135, 41816, 52270, 83632, 104540, 209080, 224761, 418160, 449522, 899044, 1123805, 1798088, 2247610, 3596176, 4495220, 8990440, 17980880]

約数ペア:

[(1, 17980880), (2, 8990440), (4, 4495220), (5, 3596176), (8, 2247610), (10, 1798088), (16, 1123805), (20, 899044), (40, 449522), (43, 418160), (80, 224761), (86, 209080), (172, 104540), (215, 83632), (344, 52270), (430, 41816), (688, 26135), (860, 20908), (1720, 10454), (3440, 5227)]