21957985

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{27277}}^1$

素因数の和:27312

約数の個数: 16

約数和(自身を含む): 31424256

約数和(自身を除く): 9466271

約数列:

[1, 5, 7, 23, 35, 115, 161, 805, 27277, 136385, 190939, 627371, 954695, 3136855, 4391597, 21957985]

約数ペア:

[(1, 21957985), (5, 4391597), (7, 3136855), (23, 954695), (35, 627371), (115, 190939), (161, 136385), (805, 27277)]