21065520

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{12539}}^1$

素因数の和:12562

約数の個数: 80

約数和(自身を含む): 74638080

約数和(自身を除く): 53572560

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 48, 56, 60, 70, 80, 84, 105, 112, 120, 140, 168, 210, 240, 280, 336, 420, 560, 840, 1680, 12539, 25078, 37617, 50156, 62695, 75234, 87773, 100312, 125390, 150468, 175546, 188085, 200624, 250780, 263319, 300936, 351092, 376170, 438865, 501560, 526638, 601872, 702184, 752340, 877730, 1003120, 1053276, 1316595, 1404368, 1504680, 1755460, 2106552, 2633190, 3009360, 3510920, 4213104, 5266380, 7021840, 10532760, 21065520]

約数ペア:

[(1, 21065520), (2, 10532760), (3, 7021840), (4, 5266380), (5, 4213104), (6, 3510920), (7, 3009360), (8, 2633190), (10, 2106552), (12, 1755460), (14, 1504680), (15, 1404368), (16, 1316595), (20, 1053276), (21, 1003120), (24, 877730), (28, 752340), (30, 702184), (35, 601872), (40, 526638), (42, 501560), (48, 438865), (56, 376170), (60, 351092), (70, 300936), (80, 263319), (84, 250780), (105, 200624), (112, 188085), (120, 175546), (140, 150468), (168, 125390), (210, 100312), (240, 87773), (280, 75234), (336, 62695), (420, 50156), (560, 37617), (840, 25078), (1680, 12539)]