21138835

素因数分解:

$5^1\times {\mathrm{67}}^1\times {\mathrm{89}}^1\times {\mathrm{709}}^1$

素因数の和:870

約数の個数: 16

約数和(自身を含む): 26071200

約数和(自身を除く): 4932365

約数列:

[1, 5, 67, 89, 335, 445, 709, 3545, 5963, 29815, 47503, 63101, 237515, 315505, 4227767, 21138835]

約数ペア:

[(1, 21138835), (5, 4227767), (67, 315505), (89, 237515), (335, 63101), (445, 47503), (709, 29815), (3545, 5963)]