20099180

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{12721}}^1$

素因数の和:12809

約数の個数: 24

約数和(自身を含む): 42745920

約数和(自身を除く): 22646740

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 12721, 25442, 50884, 63605, 127210, 254420, 1004959, 2009918, 4019836, 5024795, 10049590, 20099180]

約数ペア:

[(1, 20099180), (2, 10049590), (4, 5024795), (5, 4019836), (10, 2009918), (20, 1004959), (79, 254420), (158, 127210), (316, 63605), (395, 50884), (790, 25442), (1580, 12721)]