20967933

素因数分解:

$3^1\times 7^4\times {\mathrm{41}}^1\times {\mathrm{71}}^1$

素因数の和:143

約数の個数: 40

約数和(自身を含む): 33880896

約数和(自身を除く): 12912963

約数列:

[1, 3, 7, 21, 41, 49, 71, 123, 147, 213, 287, 343, 497, 861, 1029, 1491, 2009, 2401, 2911, 3479, 6027, 7203, 8733, 10437, 14063, 20377, 24353, 42189, 61131, 73059, 98441, 142639, 170471, 295323, 427917, 511413, 998473, 2995419, 6989311, 20967933]

約数ペア:

[(1, 20967933), (3, 6989311), (7, 2995419), (21, 998473), (41, 511413), (49, 427917), (71, 295323), (123, 170471), (147, 142639), (213, 98441), (287, 73059), (343, 61131), (497, 42189), (861, 24353), (1029, 20377), (1491, 14063), (2009, 10437), (2401, 8733), (2911, 7203), (3479, 6027)]