20989719

素因数分解:

$3^3\times {\mathrm{43}}^1\times {\mathrm{101}}^1\times {\mathrm{179}}^1$

素因数の和:332

約数の個数: 32

約数和(自身を含む): 32313600

約数和(自身を除く): 11323881

約数列:

[1, 3, 9, 27, 43, 101, 129, 179, 303, 387, 537, 909, 1161, 1611, 2727, 4343, 4833, 7697, 13029, 18079, 23091, 39087, 54237, 69273, 117261, 162711, 207819, 488133, 777397, 2332191, 6996573, 20989719]

約数ペア:

[(1, 20989719), (3, 6996573), (9, 2332191), (27, 777397), (43, 488133), (101, 207819), (129, 162711), (179, 117261), (303, 69273), (387, 54237), (537, 39087), (909, 23091), (1161, 18079), (1611, 13029), (2727, 7697), (4343, 4833)]