20771140

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79889}}^1$

素因数の和:79911

約数の個数: 24

約数和(自身を含む): 46975320

約数和(自身を除く): 26204180

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 79889, 159778, 319556, 399445, 798890, 1038557, 1597780, 2077114, 4154228, 5192785, 10385570, 20771140]

約数ペア:

[(1, 20771140), (2, 10385570), (4, 5192785), (5, 4154228), (10, 2077114), (13, 1597780), (20, 1038557), (26, 798890), (52, 399445), (65, 319556), (130, 159778), (260, 79889)]