20988369

素因数分解:

$3^3\times {\mathrm{19}}^1\times {\mathrm{163}}^1\times {\mathrm{251}}^1$

素因数の和:442

約数の個数: 32

約数和(自身を含む): 33062400

約数和(自身を除く): 12074031

約数列:

[1, 3, 9, 19, 27, 57, 163, 171, 251, 489, 513, 753, 1467, 2259, 3097, 4401, 4769, 6777, 9291, 14307, 27873, 40913, 42921, 83619, 122739, 128763, 368217, 777347, 1104651, 2332041, 6996123, 20988369]

約数ペア:

[(1, 20988369), (3, 6996123), (9, 2332041), (19, 1104651), (27, 777347), (57, 368217), (163, 128763), (171, 122739), (251, 83619), (489, 42921), (513, 40913), (753, 27873), (1467, 14307), (2259, 9291), (3097, 6777), (4401, 4769)]