21661761

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{113}}^1\times {\mathrm{157}}^1$

素因数の和:321

約数の個数: 32

約数和(自身を含む): 32853888

約数和(自身を除く): 11192127

約数列:

[1, 3, 11, 33, 37, 111, 113, 157, 339, 407, 471, 1221, 1243, 1727, 3729, 4181, 5181, 5809, 12543, 17427, 17741, 45991, 53223, 63899, 137973, 191697, 195151, 585453, 656417, 1969251, 7220587, 21661761]

約数ペア:

[(1, 21661761), (3, 7220587), (11, 1969251), (33, 656417), (37, 585453), (111, 195151), (113, 191697), (157, 137973), (339, 63899), (407, 53223), (471, 45991), (1221, 17741), (1243, 17427), (1727, 12543), (3729, 5809), (4181, 5181)]