20531505

素因数分解:

$3^1\times 5^1\times {\mathrm{97}}^1\times {\mathrm{103}}^1\times {\mathrm{137}}^1$

素因数の和:345

約数の個数: 32

約数和(自身を含む): 33755904

約数和(自身を除く): 13224399

約数列:

[1, 3, 5, 15, 97, 103, 137, 291, 309, 411, 485, 515, 685, 1455, 1545, 2055, 9991, 13289, 14111, 29973, 39867, 42333, 49955, 66445, 70555, 149865, 199335, 211665, 1368767, 4106301, 6843835, 20531505]

約数ペア:

[(1, 20531505), (3, 6843835), (5, 4106301), (15, 1368767), (97, 211665), (103, 199335), (137, 149865), (291, 70555), (309, 66445), (411, 49955), (485, 42333), (515, 39867), (685, 29973), (1455, 14111), (1545, 13289), (2055, 9991)]