20872995

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{263}}^1$

素因数の和:332

約数の個数: 64

約数和(自身を含む): 40449024

約数和(自身を除く): 19576029

約数列:

[1, 3, 5, 11, 13, 15, 33, 37, 39, 55, 65, 111, 143, 165, 185, 195, 263, 407, 429, 481, 555, 715, 789, 1221, 1315, 1443, 2035, 2145, 2405, 2893, 3419, 3945, 5291, 6105, 7215, 8679, 9731, 10257, 14465, 15873, 17095, 26455, 29193, 37609, 43395, 48655, 51285, 79365, 107041, 112827, 126503, 145965, 188045, 321123, 379509, 535205, 564135, 632515, 1391533, 1605615, 1897545, 4174599, 6957665, 20872995]

約数ペア:

[(1, 20872995), (3, 6957665), (5, 4174599), (11, 1897545), (13, 1605615), (15, 1391533), (33, 632515), (37, 564135), (39, 535205), (55, 379509), (65, 321123), (111, 188045), (143, 145965), (165, 126503), (185, 112827), (195, 107041), (263, 79365), (407, 51285), (429, 48655), (481, 43395), (555, 37609), (715, 29193), (789, 26455), (1221, 17095), (1315, 15873), (1443, 14465), (2035, 10257), (2145, 9731), (2405, 8679), (2893, 7215), (3419, 6105), (3945, 5291)]