408236875

素因数分解:

$5^4\times {\mathrm{641}}^1\times {\mathrm{1019}}^1$

素因数の和:1680

約数の個数: 20

約数和(自身を含む): 511430040

約数和(自身を除く): 103193165

約数列:

[1, 5, 25, 125, 625, 641, 1019, 3205, 5095, 16025, 25475, 80125, 127375, 400625, 636875, 653179, 3265895, 16329475, 81647375, 408236875]

約数ペア:

[(1, 408236875), (5, 81647375), (25, 16329475), (125, 3265895), (625, 653179), (641, 636875), (1019, 400625), (3205, 127375), (5095, 80125), (16025, 25475)]