21543925

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{151}}^1\times {\mathrm{439}}^1$

素因数の和:613

約数の個数: 24

約数和(自身を含む): 29025920

約数和(自身を除く): 7481995

約数列:

[1, 5, 13, 25, 65, 151, 325, 439, 755, 1963, 2195, 3775, 5707, 9815, 10975, 28535, 49075, 66289, 142675, 331445, 861757, 1657225, 4308785, 21543925]

約数ペア:

[(1, 21543925), (5, 4308785), (13, 1657225), (25, 861757), (65, 331445), (151, 142675), (325, 66289), (439, 49075), (755, 28535), (1963, 10975), (2195, 9815), (3775, 5707)]