20421436

素因数分解:

$2^2\times 7^2\times {\mathrm{31}}^1\times {\mathrm{3361}}^1$

素因数の和:3410

約数の個数: 36

約数和(自身を含む): 42926016

約数和(自身を除く): 22504580

約数列:

[1, 2, 4, 7, 14, 28, 31, 49, 62, 98, 124, 196, 217, 434, 868, 1519, 3038, 3361, 6076, 6722, 13444, 23527, 47054, 94108, 104191, 164689, 208382, 329378, 416764, 658756, 729337, 1458674, 2917348, 5105359, 10210718, 20421436]

約数ペア:

[(1, 20421436), (2, 10210718), (4, 5105359), (7, 2917348), (14, 1458674), (28, 729337), (31, 658756), (49, 416764), (62, 329378), (98, 208382), (124, 164689), (196, 104191), (217, 94108), (434, 47054), (868, 23527), (1519, 13444), (3038, 6722), (3361, 6076)]