221405821

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{571}}^1\times {\mathrm{4261}}^1$

素因数の和:4852

約数の個数: 16

約数和(自身を含む): 273040768

約数和(自身を除く): 51634947

約数列:

[1, 7, 13, 91, 571, 3997, 4261, 7423, 29827, 51961, 55393, 387751, 2433031, 17031217, 31629403, 221405821]

約数ペア:

[(1, 221405821), (7, 31629403), (13, 17031217), (91, 2433031), (571, 387751), (3997, 55393), (4261, 51961), (7423, 29827)]