21609560

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{1087}}^1$

素因数の和:1176

約数の個数: 64

約数和(自身を含む): 56401920

約数和(自身を除く): 34792360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 71, 140, 142, 280, 284, 355, 497, 568, 710, 994, 1087, 1420, 1988, 2174, 2485, 2840, 3976, 4348, 4970, 5435, 7609, 8696, 9940, 10870, 15218, 19880, 21740, 30436, 38045, 43480, 60872, 76090, 77177, 152180, 154354, 304360, 308708, 385885, 540239, 617416, 771770, 1080478, 1543540, 2160956, 2701195, 3087080, 4321912, 5402390, 10804780, 21609560]

約数ペア:

[(1, 21609560), (2, 10804780), (4, 5402390), (5, 4321912), (7, 3087080), (8, 2701195), (10, 2160956), (14, 1543540), (20, 1080478), (28, 771770), (35, 617416), (40, 540239), (56, 385885), (70, 308708), (71, 304360), (140, 154354), (142, 152180), (280, 77177), (284, 76090), (355, 60872), (497, 43480), (568, 38045), (710, 30436), (994, 21740), (1087, 19880), (1420, 15218), (1988, 10870), (2174, 9940), (2485, 8696), (2840, 7609), (3976, 5435), (4348, 4970)]