21890995

素因数分解:

$5^1\times 7^2\times {\mathrm{199}}^1\times {\mathrm{449}}^1$

素因数の和:667

約数の個数: 24

約数和(自身を含む): 30780000

約数和(自身を除く): 8889005

約数列:

[1, 5, 7, 35, 49, 199, 245, 449, 995, 1393, 2245, 3143, 6965, 9751, 15715, 22001, 48755, 89351, 110005, 446755, 625457, 3127285, 4378199, 21890995]

約数ペア:

[(1, 21890995), (5, 4378199), (7, 3127285), (35, 625457), (49, 446755), (199, 110005), (245, 89351), (449, 48755), (995, 22001), (1393, 15715), (2245, 9751), (3143, 6965)]