20212713

素因数分解:

$3^3\times {\mathrm{19}}^1\times {\mathrm{31}}^2\times {\mathrm{41}}^1$

素因数の和:131

約数の個数: 48

約数和(自身を含む): 33364800

約数和(自身を除く): 13152087

約数列:

[1, 3, 9, 19, 27, 31, 41, 57, 93, 123, 171, 279, 369, 513, 589, 779, 837, 961, 1107, 1271, 1767, 2337, 2883, 3813, 5301, 7011, 8649, 11439, 15903, 18259, 21033, 24149, 25947, 34317, 39401, 54777, 72447, 118203, 164331, 217341, 354609, 492993, 652023, 748619, 1063827, 2245857, 6737571, 20212713]

約数ペア:

[(1, 20212713), (3, 6737571), (9, 2245857), (19, 1063827), (27, 748619), (31, 652023), (41, 492993), (57, 354609), (93, 217341), (123, 164331), (171, 118203), (279, 72447), (369, 54777), (513, 39401), (589, 34317), (779, 25947), (837, 24149), (961, 21033), (1107, 18259), (1271, 15903), (1767, 11439), (2337, 8649), (2883, 7011), (3813, 5301)]