20721875

素因数分解:

$5^5\times {\mathrm{19}}^1\times {\mathrm{349}}^1$

素因数の和:393

約数の個数: 24

約数和(自身を含む): 27342000

約数和(自身を除く): 6620125

約数列:

[1, 5, 19, 25, 95, 125, 349, 475, 625, 1745, 2375, 3125, 6631, 8725, 11875, 33155, 43625, 59375, 165775, 218125, 828875, 1090625, 4144375, 20721875]

約数ペア:

[(1, 20721875), (5, 4144375), (19, 1090625), (25, 828875), (95, 218125), (125, 165775), (349, 59375), (475, 43625), (625, 33155), (1745, 11875), (2375, 8725), (3125, 6631)]