28720755

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{1249}}^1$

素因数の和:1340

約数の個数: 48

約数和(自身を含む): 57720000

約数和(自身を除く): 28999245

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 73, 105, 219, 315, 365, 511, 657, 1095, 1249, 1533, 2555, 3285, 3747, 4599, 6245, 7665, 8743, 11241, 18735, 22995, 26229, 43715, 56205, 78687, 91177, 131145, 273531, 393435, 455885, 638239, 820593, 1367655, 1914717, 3191195, 4102965, 5744151, 9573585, 28720755]

約数ペア:

[(1, 28720755), (3, 9573585), (5, 5744151), (7, 4102965), (9, 3191195), (15, 1914717), (21, 1367655), (35, 820593), (45, 638239), (63, 455885), (73, 393435), (105, 273531), (219, 131145), (315, 91177), (365, 78687), (511, 56205), (657, 43715), (1095, 26229), (1249, 22995), (1533, 18735), (2555, 11241), (3285, 8743), (3747, 7665), (4599, 6245)]