218640425

素因数分解:

$5^2\times {\mathrm{29}}^1\times {\mathrm{97}}^1\times {\mathrm{3109}}^1$

素因数の和:3245

約数の個数: 24

約数和(自身を含む): 283445400

約数和(自身を除く): 64804975

約数列:

[1, 5, 25, 29, 97, 145, 485, 725, 2425, 2813, 3109, 14065, 15545, 70325, 77725, 90161, 301573, 450805, 1507865, 2254025, 7539325, 8745617, 43728085, 218640425]

約数ペア:

[(1, 218640425), (5, 43728085), (25, 8745617), (29, 7539325), (97, 2254025), (145, 1507865), (485, 450805), (725, 301573), (2425, 90161), (2813, 77725), (3109, 70325), (14065, 15545)]