18980721

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{131}}^1\times {\mathrm{947}}^1$

素因数の和:1101

約数の個数: 24

約数和(自身を含む): 29281824

約数和(自身を除く): 10301103

約数列:

[1, 3, 9, 17, 51, 131, 153, 393, 947, 1179, 2227, 2841, 6681, 8523, 16099, 20043, 48297, 124057, 144891, 372171, 1116513, 2108969, 6326907, 18980721]

約数ペア:

[(1, 18980721), (3, 6326907), (9, 2108969), (17, 1116513), (51, 372171), (131, 144891), (153, 124057), (393, 48297), (947, 20043), (1179, 16099), (2227, 8523), (2841, 6681)]