19818380

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{9091}}^1$

素因数の和:9209

約数の個数: 24

約数和(自身を含む): 42005040

約数和(自身を除く): 22186660

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 9091, 18182, 36364, 45455, 90910, 181820, 990919, 1981838, 3963676, 4954595, 9909190, 19818380]

約数ペア:

[(1, 19818380), (2, 9909190), (4, 4954595), (5, 3963676), (10, 1981838), (20, 990919), (109, 181820), (218, 90910), (436, 45455), (545, 36364), (1090, 18182), (2180, 9091)]