21851795

素因数分解:

$5^1\times 7^2\times {\mathrm{79}}^1\times {\mathrm{1129}}^1$

素因数の和:1227

約数の個数: 24

約数和(自身を含む): 30916800

約数和(自身を除く): 9065005

約数列:

[1, 5, 7, 35, 49, 79, 245, 395, 553, 1129, 2765, 3871, 5645, 7903, 19355, 39515, 55321, 89191, 276605, 445955, 624337, 3121685, 4370359, 21851795]

約数ペア:

[(1, 21851795), (5, 4370359), (7, 3121685), (35, 624337), (49, 445955), (79, 276605), (245, 89191), (395, 55321), (553, 39515), (1129, 19355), (2765, 7903), (3871, 5645)]