21247905

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{202361}}^1$

素因数の和:202376

約数の個数: 16

約数和(自身を含む): 38853504

約数和(自身を除く): 17605599

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 202361, 607083, 1011805, 1416527, 3035415, 4249581, 7082635, 21247905]

約数ペア:

[(1, 21247905), (3, 7082635), (5, 4249581), (7, 3035415), (15, 1416527), (21, 1011805), (35, 607083), (105, 202361)]