20181640

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{5669}}^1$

素因数の和:5769

約数の個数: 32

約数和(自身を含む): 45927000

約数和(自身を除く): 25745360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 5669, 11338, 22676, 28345, 45352, 56690, 113380, 226760, 504541, 1009082, 2018164, 2522705, 4036328, 5045410, 10090820, 20181640]

約数ペア:

[(1, 20181640), (2, 10090820), (4, 5045410), (5, 4036328), (8, 2522705), (10, 2018164), (20, 1009082), (40, 504541), (89, 226760), (178, 113380), (356, 56690), (445, 45352), (712, 28345), (890, 22676), (1780, 11338), (3560, 5669)]