19992140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{2341}}^1$

素因数の和:2418

約数の個数: 48

約数和(自身を含む): 48788544

約数和(自身を除く): 28796404

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 61, 70, 122, 140, 244, 305, 427, 610, 854, 1220, 1708, 2135, 2341, 4270, 4682, 8540, 9364, 11705, 16387, 23410, 32774, 46820, 65548, 81935, 142801, 163870, 285602, 327740, 571204, 714005, 999607, 1428010, 1999214, 2856020, 3998428, 4998035, 9996070, 19992140]

約数ペア:

[(1, 19992140), (2, 9996070), (4, 4998035), (5, 3998428), (7, 2856020), (10, 1999214), (14, 1428010), (20, 999607), (28, 714005), (35, 571204), (61, 327740), (70, 285602), (122, 163870), (140, 142801), (244, 81935), (305, 65548), (427, 46820), (610, 32774), (854, 23410), (1220, 16387), (1708, 11705), (2135, 9364), (2341, 8540), (4270, 4682)]