20642607

素因数分解:

$3^5\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{263}}^1$

素因数の和:314

約数の個数: 48

約数和(自身を含む): 34594560

約数和(自身を除く): 13951953

約数列:

[1, 3, 9, 17, 19, 27, 51, 57, 81, 153, 171, 243, 263, 323, 459, 513, 789, 969, 1377, 1539, 2367, 2907, 4131, 4471, 4617, 4997, 7101, 8721, 13413, 14991, 21303, 26163, 40239, 44973, 63909, 78489, 84949, 120717, 134919, 254847, 362151, 404757, 764541, 1086453, 1214271, 2293623, 6880869, 20642607]

約数ペア:

[(1, 20642607), (3, 6880869), (9, 2293623), (17, 1214271), (19, 1086453), (27, 764541), (51, 404757), (57, 362151), (81, 254847), (153, 134919), (171, 120717), (243, 84949), (263, 78489), (323, 63909), (459, 44973), (513, 40239), (789, 26163), (969, 21303), (1377, 14991), (1539, 13413), (2367, 8721), (2907, 7101), (4131, 4997), (4471, 4617)]