21870625

素因数分解:

$5^4\times 7^1\times {\mathrm{4999}}^1$

素因数の和:5026

約数の個数: 20

約数和(自身を含む): 31240000

約数和(自身を除く): 9369375

約数列:

[1, 5, 7, 25, 35, 125, 175, 625, 875, 4375, 4999, 24995, 34993, 124975, 174965, 624875, 874825, 3124375, 4374125, 21870625]

約数ペア:

[(1, 21870625), (5, 4374125), (7, 3124375), (25, 874825), (35, 624875), (125, 174965), (175, 124975), (625, 34993), (875, 24995), (4375, 4999)]