21906555

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{103}}^1\times {\mathrm{1289}}^1$

素因数の和:1411

約数の個数: 32

約数和(自身を含む): 38638080

約数和(自身を除く): 16731525

約数列:

[1, 3, 5, 11, 15, 33, 55, 103, 165, 309, 515, 1133, 1289, 1545, 3399, 3867, 5665, 6445, 14179, 16995, 19335, 42537, 70895, 132767, 212685, 398301, 663835, 1460437, 1991505, 4381311, 7302185, 21906555]

約数ペア:

[(1, 21906555), (3, 7302185), (5, 4381311), (11, 1991505), (15, 1460437), (33, 663835), (55, 398301), (103, 212685), (165, 132767), (309, 70895), (515, 42537), (1133, 19335), (1289, 16995), (1545, 14179), (3399, 6445), (3867, 5665)]