20853755

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1$

素因数の和:120

約数の個数: 48

約数和(自身を含む): 30041280

約数和(自身を除く): 9187525

約数列:

[1, 5, 13, 23, 29, 37, 65, 115, 145, 169, 185, 299, 377, 481, 667, 845, 851, 1073, 1495, 1885, 2405, 3335, 3887, 4255, 4901, 5365, 6253, 8671, 11063, 13949, 19435, 24505, 24679, 31265, 43355, 55315, 69745, 112723, 123395, 143819, 181337, 320827, 563615, 719095, 906685, 1604135, 4170751, 20853755]

約数ペア:

[(1, 20853755), (5, 4170751), (13, 1604135), (23, 906685), (29, 719095), (37, 563615), (65, 320827), (115, 181337), (145, 143819), (169, 123395), (185, 112723), (299, 69745), (377, 55315), (481, 43355), (667, 31265), (845, 24679), (851, 24505), (1073, 19435), (1495, 13949), (1885, 11063), (2405, 8671), (3335, 6253), (3887, 5365), (4255, 4901)]