999869905

素因数分解:

$5^1\times {\mathrm{151}}^1\times {\mathrm{331}}^1\times {\mathrm{4001}}^1$

素因数の和:4488

約数の個数: 16

約数和(自身を含む): 1211741568

約数和(自身を除く): 211871663

約数列:

[1, 5, 151, 331, 755, 1655, 4001, 20005, 49981, 249905, 604151, 1324331, 3020755, 6621655, 199973981, 999869905]

約数ペア:

[(1, 999869905), (5, 199973981), (151, 6621655), (331, 3020755), (755, 1324331), (1655, 604151), (4001, 249905), (20005, 49981)]