21104395

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{269}}^1$

素因数の和:375

約数の個数: 32

約数和(自身を含む): 29393280

約数和(自身を除く): 8288885

約数列:

[1, 5, 13, 17, 65, 71, 85, 221, 269, 355, 923, 1105, 1207, 1345, 3497, 4573, 4615, 6035, 15691, 17485, 19099, 22865, 59449, 78455, 95495, 248287, 297245, 324683, 1241435, 1623415, 4220879, 21104395]

約数ペア:

[(1, 21104395), (5, 4220879), (13, 1623415), (17, 1241435), (65, 324683), (71, 297245), (85, 248287), (221, 95495), (269, 78455), (355, 59449), (923, 22865), (1105, 19099), (1207, 17485), (1345, 15691), (3497, 6035), (4573, 4615)]