21206225

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{1217}}^1$

素因数の和:1285

約数の個数: 24

約数和(自身を含む): 28545048

約数和(自身を除く): 7338823

約数列:

[1, 5, 17, 25, 41, 85, 205, 425, 697, 1025, 1217, 3485, 6085, 17425, 20689, 30425, 49897, 103445, 249485, 517225, 848249, 1247425, 4241245, 21206225]

約数ペア:

[(1, 21206225), (5, 4241245), (17, 1247425), (25, 848249), (41, 517225), (85, 249485), (205, 103445), (425, 49897), (697, 30425), (1025, 20689), (1217, 17425), (3485, 6085)]