400330880

素因数分解:

$2^7\times 5^1\times {\mathrm{625517}}^1$

素因数の和:625536

約数の個数: 32

約数和(自身を含む): 957042540

約数和(自身を除く): 556711660

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 625517, 1251034, 2502068, 3127585, 5004136, 6255170, 10008272, 12510340, 20016544, 25020680, 40033088, 50041360, 80066176, 100082720, 200165440, 400330880]

約数ペア:

[(1, 400330880), (2, 200165440), (4, 100082720), (5, 80066176), (8, 50041360), (10, 40033088), (16, 25020680), (20, 20016544), (32, 12510340), (40, 10008272), (64, 6255170), (80, 5004136), (128, 3127585), (160, 2502068), (320, 1251034), (640, 625517)]