20990814

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^2\times {\mathrm{127}}^1\times {\mathrm{163}}^1$

素因数の和:321

約数の個数: 48

約数和(自身を含む): 46098432

約数和(自身を除く): 25107618

約数列:

[1, 2, 3, 6, 13, 26, 39, 78, 127, 163, 169, 254, 326, 338, 381, 489, 507, 762, 978, 1014, 1651, 2119, 3302, 4238, 4953, 6357, 9906, 12714, 20701, 21463, 27547, 41402, 42926, 55094, 62103, 64389, 82641, 124206, 128778, 165282, 269113, 538226, 807339, 1614678, 3498469, 6996938, 10495407, 20990814]

約数ペア:

[(1, 20990814), (2, 10495407), (3, 6996938), (6, 3498469), (13, 1614678), (26, 807339), (39, 538226), (78, 269113), (127, 165282), (163, 128778), (169, 124206), (254, 82641), (326, 64389), (338, 62103), (381, 55094), (489, 42926), (507, 41402), (762, 27547), (978, 21463), (1014, 20701), (1651, 12714), (2119, 9906), (3302, 6357), (4238, 4953)]