28533125

素因数分解:

$5^4\times {\mathrm{71}}^1\times {\mathrm{643}}^1$

素因数の和:734

約数の個数: 20

約数和(自身を含む): 36213408

約数和(自身を除く): 7680283

約数列:

[1, 5, 25, 71, 125, 355, 625, 643, 1775, 3215, 8875, 16075, 44375, 45653, 80375, 228265, 401875, 1141325, 5706625, 28533125]

約数ペア:

[(1, 28533125), (5, 5706625), (25, 1141325), (71, 401875), (125, 228265), (355, 80375), (625, 45653), (643, 44375), (1775, 16075), (3215, 8875)]