19720745

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{367}}^1\times {\mathrm{977}}^1$

素因数の和:1360

約数の個数: 16

約数和(自身を含む): 25913088

約数和(自身を除く): 6192343

約数列:

[1, 5, 11, 55, 367, 977, 1835, 4037, 4885, 10747, 20185, 53735, 358559, 1792795, 3944149, 19720745]

約数ペア:

[(1, 19720745), (5, 3944149), (11, 1792795), (55, 358559), (367, 53735), (977, 20185), (1835, 10747), (4037, 4885)]