81219575

素因数分解:

$5^2\times {\mathrm{29}}^2\times {\mathrm{3863}}^1$

素因数の和:3931

約数の個数: 18

約数和(自身を含む): 104331864

約数和(自身を除く): 23112289

約数列:

[1, 5, 25, 29, 145, 725, 841, 3863, 4205, 19315, 21025, 96575, 112027, 560135, 2800675, 3248783, 16243915, 81219575]

約数ペア:

[(1, 81219575), (5, 16243915), (25, 3248783), (29, 2800675), (145, 560135), (725, 112027), (841, 96575), (3863, 21025), (4205, 19315)]