21784555

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{461}}^1\times {\mathrm{727}}^1$

素因数の和:1206

約数の個数: 16

約数和(自身を含む): 28252224

約数和(自身を除く): 6467669

約数列:

[1, 5, 13, 65, 461, 727, 2305, 3635, 5993, 9451, 29965, 47255, 335147, 1675735, 4356911, 21784555]

約数ペア:

[(1, 21784555), (5, 4356911), (13, 1675735), (65, 335147), (461, 47255), (727, 29965), (2305, 9451), (3635, 5993)]