863440

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{251}}^1$

素因数の和:307

約数の個数: 40

約数和(自身を含む): 2062368

約数和(自身を除く): 1198928

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 251, 344, 430, 502, 688, 860, 1004, 1255, 1720, 2008, 2510, 3440, 4016, 5020, 10040, 10793, 20080, 21586, 43172, 53965, 86344, 107930, 172688, 215860, 431720, 863440]

約数ペア:

[(1, 863440), (2, 431720), (4, 215860), (5, 172688), (8, 107930), (10, 86344), (16, 53965), (20, 43172), (40, 21586), (43, 20080), (80, 10793), (86, 10040), (172, 5020), (215, 4016), (251, 3440), (344, 2510), (430, 2008), (502, 1720), (688, 1255), (860, 1004)]