19997480

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{16127}}^1$

素因数の和:16169

約数の個数: 32

約数和(自身を含む): 46448640

約数和(自身を除く): 26451160

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 16127, 32254, 64508, 80635, 129016, 161270, 322540, 499937, 645080, 999874, 1999748, 2499685, 3999496, 4999370, 9998740, 19997480]

約数ペア:

[(1, 19997480), (2, 9998740), (4, 4999370), (5, 3999496), (8, 2499685), (10, 1999748), (20, 999874), (31, 645080), (40, 499937), (62, 322540), (124, 161270), (155, 129016), (248, 80635), (310, 64508), (620, 32254), (1240, 16127)]