21556213

素因数分解:

$7^1\times {\mathrm{53}}^1\times {\mathrm{97}}^1\times {\mathrm{599}}^1$

素因数の和:756

約数の個数: 16

約数和(自身を含む): 25401600

約数和(自身を除く): 3845387

約数列:

[1, 7, 53, 97, 371, 599, 679, 4193, 5141, 31747, 35987, 58103, 222229, 406721, 3079459, 21556213]

約数ペア:

[(1, 21556213), (7, 3079459), (53, 406721), (97, 222229), (371, 58103), (599, 35987), (679, 31747), (4193, 5141)]