21597555

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{103}}^1\times {\mathrm{1997}}^1$

素因数の和:2115

約数の個数: 32

約数和(自身を含む): 39896064

約数和(自身を除く): 18298509

約数列:

[1, 3, 5, 7, 15, 21, 35, 103, 105, 309, 515, 721, 1545, 1997, 2163, 3605, 5991, 9985, 10815, 13979, 29955, 41937, 69895, 205691, 209685, 617073, 1028455, 1439837, 3085365, 4319511, 7199185, 21597555]

約数ペア:

[(1, 21597555), (3, 7199185), (5, 4319511), (7, 3085365), (15, 1439837), (21, 1028455), (35, 617073), (103, 209685), (105, 205691), (309, 69895), (515, 41937), (721, 29955), (1545, 13979), (1997, 10815), (2163, 9985), (3605, 5991)]