20878655

素因数分解:

$5^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{2749}}^1$

素因数の和:2799

約数の個数: 24

約数和(自身を含む): 30096000

約数和(自身を除く): 9217345

約数列:

[1, 5, 7, 31, 35, 49, 155, 217, 245, 1085, 1519, 2749, 7595, 13745, 19243, 85219, 96215, 134701, 426095, 596533, 673505, 2982665, 4175731, 20878655]

約数ペア:

[(1, 20878655), (5, 4175731), (7, 2982665), (31, 673505), (35, 596533), (49, 426095), (155, 134701), (217, 96215), (245, 85219), (1085, 19243), (1519, 13745), (2749, 7595)]