20990760

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{24989}}^1$

素因数の和:25010

約数の個数: 64

約数和(自身を含む): 71971200

約数和(自身を除く): 50980440

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 24989, 49978, 74967, 99956, 124945, 149934, 174923, 199912, 249890, 299868, 349846, 374835, 499780, 524769, 599736, 699692, 749670, 874615, 999560, 1049538, 1399384, 1499340, 1749230, 2099076, 2623845, 2998680, 3498460, 4198152, 5247690, 6996920, 10495380, 20990760]

約数ペア:

[(1, 20990760), (2, 10495380), (3, 6996920), (4, 5247690), (5, 4198152), (6, 3498460), (7, 2998680), (8, 2623845), (10, 2099076), (12, 1749230), (14, 1499340), (15, 1399384), (20, 1049538), (21, 999560), (24, 874615), (28, 749670), (30, 699692), (35, 599736), (40, 524769), (42, 499780), (56, 374835), (60, 349846), (70, 299868), (84, 249890), (105, 199912), (120, 174923), (140, 149934), (168, 124945), (210, 99956), (280, 74967), (420, 49978), (840, 24989)]