21263805

素因数分解:

$3^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{6473}}^1$

素因数の和:6557

約数の個数: 24

約数和(自身を含む): 37367928

約数和(自身を除く): 16104123

約数列:

[1, 3, 5, 9, 15, 45, 73, 219, 365, 657, 1095, 3285, 6473, 19419, 32365, 58257, 97095, 291285, 472529, 1417587, 2362645, 4252761, 7087935, 21263805]

約数ペア:

[(1, 21263805), (3, 7087935), (5, 4252761), (9, 2362645), (15, 1417587), (45, 472529), (73, 291285), (219, 97095), (365, 58257), (657, 32365), (1095, 19419), (3285, 6473)]