28398860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{1861}}^1$

素因数の和:1986

約数の個数: 48

約数和(自身を含む): 68819520

約数和(自身を除く): 40420660

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 109, 140, 218, 436, 545, 763, 1090, 1526, 1861, 2180, 3052, 3722, 3815, 7444, 7630, 9305, 13027, 15260, 18610, 26054, 37220, 52108, 65135, 130270, 202849, 260540, 405698, 811396, 1014245, 1419943, 2028490, 2839886, 4056980, 5679772, 7099715, 14199430, 28398860]

約数ペア:

[(1, 28398860), (2, 14199430), (4, 7099715), (5, 5679772), (7, 4056980), (10, 2839886), (14, 2028490), (20, 1419943), (28, 1014245), (35, 811396), (70, 405698), (109, 260540), (140, 202849), (218, 130270), (436, 65135), (545, 52108), (763, 37220), (1090, 26054), (1526, 18610), (1861, 15260), (2180, 13027), (3052, 9305), (3722, 7630), (3815, 7444)]