40000

素因数分解:

$2^6\times 5^4$

素因数の和:32

約数の個数: 35

約数和(自身を含む): 99187

約数和(自身を除く): 59187

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 160, 200, 250, 320, 400, 500, 625, 800, 1000, 1250, 1600, 2000, 2500, 4000, 5000, 8000, 10000, 20000, 40000]

約数ペア:

[(1, 40000), (2, 20000), (4, 10000), (5, 8000), (8, 5000), (10, 4000), (16, 2500), (20, 2000), (25, 1600), (32, 1250), (40, 1000), (50, 800), (64, 625), (80, 500), (100, 400), (125, 320), (160, 250)]