20392785

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{1579}}^1$

素因数の和:1638

約数の個数: 48

約数和(自身を含む): 41408640

約数和(自身を除く): 21015855

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 41, 45, 63, 105, 123, 205, 287, 315, 369, 615, 861, 1435, 1579, 1845, 2583, 4305, 4737, 7895, 11053, 12915, 14211, 23685, 33159, 55265, 64739, 71055, 99477, 165795, 194217, 323695, 453173, 497385, 582651, 971085, 1359519, 2265865, 2913255, 4078557, 6797595, 20392785]

約数ペア:

[(1, 20392785), (3, 6797595), (5, 4078557), (7, 2913255), (9, 2265865), (15, 1359519), (21, 971085), (35, 582651), (41, 497385), (45, 453173), (63, 323695), (105, 194217), (123, 165795), (205, 99477), (287, 71055), (315, 64739), (369, 55265), (615, 33159), (861, 23685), (1435, 14211), (1579, 12915), (1845, 11053), (2583, 7895), (4305, 4737)]