21000724794

素因数分解:

$2^1\times 3^3\times 7^1\times {\mathrm{137}}^1\times {\mathrm{405529}}^1$

素因数の和:405684

約数の個数: 64

約数和(自身を含む): 53724614400

約数和(自身を除く): 32723889606

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 27, 42, 54, 63, 126, 137, 189, 274, 378, 411, 822, 959, 1233, 1918, 2466, 2877, 3699, 5754, 7398, 8631, 17262, 25893, 51786, 405529, 811058, 1216587, 2433174, 2838703, 3649761, 5677406, 7299522, 8516109, 10949283, 17032218, 21898566, 25548327, 51096654, 55557473, 76644981, 111114946, 153289962, 166672419, 333344838, 388902311, 500017257, 777804622, 1000034514, 1166706933, 1500051771, 2333413866, 3000103542, 3500120799, 7000241598, 10500362397, 21000724794]

約数ペア:

[(1, 21000724794), (2, 10500362397), (3, 7000241598), (6, 3500120799), (7, 3000103542), (9, 2333413866), (14, 1500051771), (18, 1166706933), (21, 1000034514), (27, 777804622), (42, 500017257), (54, 388902311), (63, 333344838), (126, 166672419), (137, 153289962), (189, 111114946), (274, 76644981), (378, 55557473), (411, 51096654), (822, 25548327), (959, 21898566), (1233, 17032218), (1918, 10949283), (2466, 8516109), (2877, 7299522), (3699, 5677406), (5754, 3649761), (7398, 2838703), (8631, 2433174), (17262, 1216587), (25893, 811058), (51786, 405529)]