19955005

素因数分解:

$5^1\times 7^2\times {\mathrm{79}}^1\times {\mathrm{1031}}^1$

素因数の和:1129

約数の個数: 24

約数和(自身を含む): 28235520

約数和(自身を除く): 8280515

約数列:

[1, 5, 7, 35, 49, 79, 245, 395, 553, 1031, 2765, 3871, 5155, 7217, 19355, 36085, 50519, 81449, 252595, 407245, 570143, 2850715, 3991001, 19955005]

約数ペア:

[(1, 19955005), (5, 3991001), (7, 2850715), (35, 570143), (49, 407245), (79, 252595), (245, 81449), (395, 50519), (553, 36085), (1031, 19355), (2765, 7217), (3871, 5155)]