21365439

素因数分解:

$3^1\times {\mathrm{101}}^1\times {\mathrm{107}}^1\times {\mathrm{659}}^1$

素因数の和:870

約数の個数: 16

約数和(自身を含む): 29082240

約数和(自身を除く): 7716801

約数列:

[1, 3, 101, 107, 303, 321, 659, 1977, 10807, 32421, 66559, 70513, 199677, 211539, 7121813, 21365439]

約数ペア:

[(1, 21365439), (3, 7121813), (101, 211539), (107, 199677), (303, 70513), (321, 66559), (659, 32421), (1977, 10807)]