20681080

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{233}}^1\times {\mathrm{317}}^1$

素因数の和:568

約数の個数: 64

約数和(自身を含む): 53576640

約数和(自身を除く): 32895560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 233, 280, 317, 466, 634, 932, 1165, 1268, 1585, 1631, 1864, 2219, 2330, 2536, 3170, 3262, 4438, 4660, 6340, 6524, 8155, 8876, 9320, 11095, 12680, 13048, 16310, 17752, 22190, 32620, 44380, 65240, 73861, 88760, 147722, 295444, 369305, 517027, 590888, 738610, 1034054, 1477220, 2068108, 2585135, 2954440, 4136216, 5170270, 10340540, 20681080]

約数ペア:

[(1, 20681080), (2, 10340540), (4, 5170270), (5, 4136216), (7, 2954440), (8, 2585135), (10, 2068108), (14, 1477220), (20, 1034054), (28, 738610), (35, 590888), (40, 517027), (56, 369305), (70, 295444), (140, 147722), (233, 88760), (280, 73861), (317, 65240), (466, 44380), (634, 32620), (932, 22190), (1165, 17752), (1268, 16310), (1585, 13048), (1631, 12680), (1864, 11095), (2219, 9320), (2330, 8876), (2536, 8155), (3170, 6524), (3262, 6340), (4438, 4660)]