521720425

素因数分解:

$5^2\times {\mathrm{71}}^1\times {\mathrm{173}}^1\times {\mathrm{1699}}^1$

素因数の和:1953

約数の個数: 24

約数和(自身を含む): 660225600

約数和(自身を除く): 138505175

約数列:

[1, 5, 25, 71, 173, 355, 865, 1699, 1775, 4325, 8495, 12283, 42475, 61415, 120629, 293927, 307075, 603145, 1469635, 3015725, 7348175, 20868817, 104344085, 521720425]

約数ペア:

[(1, 521720425), (5, 104344085), (25, 20868817), (71, 7348175), (173, 3015725), (355, 1469635), (865, 603145), (1699, 307075), (1775, 293927), (4325, 120629), (8495, 61415), (12283, 42475)]