21000000165

素因数分解:

$3^1\times 5^1\times {\mathrm{6521}}^1\times {\mathrm{214691}}^1$

素因数の和:221220

約数の個数: 16

約数和(自身を含む): 33605309376

約数和(自身を除く): 12605309211

約数列:

[1, 3, 5, 15, 6521, 19563, 32605, 97815, 214691, 644073, 1073455, 3220365, 1400000011, 4200000033, 7000000055, 21000000165]

約数ペア:

[(1, 21000000165), (3, 7000000055), (5, 4200000033), (15, 1400000011), (6521, 3220365), (19563, 1073455), (32605, 644073), (97815, 214691)]