20978538

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{307}}^1\times {\mathrm{1627}}^1$

素因数の和:1946

約数の個数: 32

約数和(自身を含む): 48136704

約数和(自身を除く): 27158166

約数列:

[1, 2, 3, 6, 7, 14, 21, 42, 307, 614, 921, 1627, 1842, 2149, 3254, 4298, 4881, 6447, 9762, 11389, 12894, 22778, 34167, 68334, 499489, 998978, 1498467, 2996934, 3496423, 6992846, 10489269, 20978538]

約数ペア:

[(1, 20978538), (2, 10489269), (3, 6992846), (6, 3496423), (7, 2996934), (14, 1498467), (21, 998978), (42, 499489), (307, 68334), (614, 34167), (921, 22778), (1627, 12894), (1842, 11389), (2149, 9762), (3254, 6447), (4298, 4881)]