21353825

素因数分解:

$5^2\times {\mathrm{41}}^1\times {\mathrm{83}}^1\times {\mathrm{251}}^1$

素因数の和:385

約数の個数: 24

約数和(自身を含む): 27560736

約数和(自身を除く): 6206911

約数列:

[1, 5, 25, 41, 83, 205, 251, 415, 1025, 1255, 2075, 3403, 6275, 10291, 17015, 20833, 51455, 85075, 104165, 257275, 520825, 854153, 4270765, 21353825]

約数ペア:

[(1, 21353825), (5, 4270765), (25, 854153), (41, 520825), (83, 257275), (205, 104165), (251, 85075), (415, 51455), (1025, 20833), (1255, 17015), (2075, 10291), (3403, 6275)]