2561420

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{1439}}^1$

素因数の和:1537

約数の個数: 24

約数和(自身を含む): 5443200

約数和(自身を除く): 2881780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1439, 1780, 2878, 5756, 7195, 14390, 28780, 128071, 256142, 512284, 640355, 1280710, 2561420]

約数ペア:

[(1, 2561420), (2, 1280710), (4, 640355), (5, 512284), (10, 256142), (20, 128071), (89, 28780), (178, 14390), (356, 7195), (445, 5756), (890, 2878), (1439, 1780)]