20979585

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{3853}}^1$

素因数の和:3886

約数の個数: 36

約数和(自身を含む): 39981396

約数和(自身を除く): 19001811

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 99, 121, 165, 363, 495, 605, 1089, 1815, 3853, 5445, 11559, 19265, 34677, 42383, 57795, 127149, 173385, 211915, 381447, 466213, 635745, 1398639, 1907235, 2331065, 4195917, 6993195, 20979585]

約数ペア:

[(1, 20979585), (3, 6993195), (5, 4195917), (9, 2331065), (11, 1907235), (15, 1398639), (33, 635745), (45, 466213), (55, 381447), (99, 211915), (121, 173385), (165, 127149), (363, 57795), (495, 42383), (605, 34677), (1089, 19265), (1815, 11559), (3853, 5445)]