18738125

素因数分解:

$5^4\times 7^1\times {\mathrm{4283}}^1$

素因数の和:4310

約数の個数: 20

約数和(自身を含む): 26766432

約数和(自身を除く): 8028307

約数列:

[1, 5, 7, 25, 35, 125, 175, 625, 875, 4283, 4375, 21415, 29981, 107075, 149905, 535375, 749525, 2676875, 3747625, 18738125]

約数ペア:

[(1, 18738125), (5, 3747625), (7, 2676875), (25, 749525), (35, 535375), (125, 149905), (175, 107075), (625, 29981), (875, 21415), (4283, 4375)]