20647809

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1483}}^1$

素因数の和:1526

約数の個数: 48

約数和(自身を含む): 38892672

約数和(自身を除く): 18244863

約数列:

[1, 3, 7, 9, 13, 17, 21, 39, 51, 63, 91, 117, 119, 153, 221, 273, 357, 663, 819, 1071, 1483, 1547, 1989, 4449, 4641, 10381, 13347, 13923, 19279, 25211, 31143, 57837, 75633, 93429, 134953, 173511, 176477, 226899, 327743, 404859, 529431, 983229, 1214577, 1588293, 2294201, 2949687, 6882603, 20647809]

約数ペア:

[(1, 20647809), (3, 6882603), (7, 2949687), (9, 2294201), (13, 1588293), (17, 1214577), (21, 983229), (39, 529431), (51, 404859), (63, 327743), (91, 226899), (117, 176477), (119, 173511), (153, 134953), (221, 93429), (273, 75633), (357, 57837), (663, 31143), (819, 25211), (1071, 19279), (1483, 13923), (1547, 13347), (1989, 10381), (4449, 4641)]