20596640

素因数分解:

$2^5\times 5^1\times {\mathrm{109}}^1\times {\mathrm{1181}}^1$

素因数の和:1305

約数の個数: 48

約数和(自身を含む): 49147560

約数和(自身を除く): 28550920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 109, 160, 218, 436, 545, 872, 1090, 1181, 1744, 2180, 2362, 3488, 4360, 4724, 5905, 8720, 9448, 11810, 17440, 18896, 23620, 37792, 47240, 94480, 128729, 188960, 257458, 514916, 643645, 1029832, 1287290, 2059664, 2574580, 4119328, 5149160, 10298320, 20596640]

約数ペア:

[(1, 20596640), (2, 10298320), (4, 5149160), (5, 4119328), (8, 2574580), (10, 2059664), (16, 1287290), (20, 1029832), (32, 643645), (40, 514916), (80, 257458), (109, 188960), (160, 128729), (218, 94480), (436, 47240), (545, 37792), (872, 23620), (1090, 18896), (1181, 17440), (1744, 11810), (2180, 9448), (2362, 8720), (3488, 5905), (4360, 4724)]