19566640

素因数分解:

$2^4\times 5^1\times {\mathrm{244583}}^1$

素因数の和:244596

約数の個数: 20

約数和(自身を含む): 45492624

約数和(自身を除く): 25925984

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 244583, 489166, 978332, 1222915, 1956664, 2445830, 3913328, 4891660, 9783320, 19566640]

約数ペア:

[(1, 19566640), (2, 9783320), (4, 4891660), (5, 3913328), (8, 2445830), (10, 1956664), (16, 1222915), (20, 978332), (40, 489166), (80, 244583)]