20120815

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{263}}^1$

素因数の和:399

約数の個数: 32

約数和(自身を含む): 28740096

約数和(自身を除く): 8619281

約数列:

[1, 5, 11, 13, 55, 65, 107, 143, 263, 535, 715, 1177, 1315, 1391, 2893, 3419, 5885, 6955, 14465, 15301, 17095, 28141, 37609, 76505, 140705, 188045, 309551, 365833, 1547755, 1829165, 4024163, 20120815]

約数ペア:

[(1, 20120815), (5, 4024163), (11, 1829165), (13, 1547755), (55, 365833), (65, 309551), (107, 188045), (143, 140705), (263, 76505), (535, 37609), (715, 28141), (1177, 17095), (1315, 15301), (1391, 14465), (2893, 6955), (3419, 5885)]