20920515

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{307}}^1$

素因数の和:392

約数の個数: 64

約数和(自身を含む): 42577920

約数和(自身を除く): 21657405

約数列:

[1, 3, 5, 7, 11, 15, 21, 33, 35, 55, 59, 77, 105, 165, 177, 231, 295, 307, 385, 413, 649, 885, 921, 1155, 1239, 1535, 1947, 2065, 2149, 3245, 3377, 4543, 4605, 6195, 6447, 9735, 10131, 10745, 13629, 16885, 18113, 22715, 23639, 32235, 50655, 54339, 68145, 70917, 90565, 118195, 126791, 199243, 271695, 354585, 380373, 597729, 633955, 996215, 1394701, 1901865, 2988645, 4184103, 6973505, 20920515]

約数ペア:

[(1, 20920515), (3, 6973505), (5, 4184103), (7, 2988645), (11, 1901865), (15, 1394701), (21, 996215), (33, 633955), (35, 597729), (55, 380373), (59, 354585), (77, 271695), (105, 199243), (165, 126791), (177, 118195), (231, 90565), (295, 70917), (307, 68145), (385, 54339), (413, 50655), (649, 32235), (885, 23639), (921, 22715), (1155, 18113), (1239, 16885), (1535, 13629), (1947, 10745), (2065, 10131), (2149, 9735), (3245, 6447), (3377, 6195), (4543, 4605)]