19955440

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{5801}}^1$

素因数の和:5857

約数の個数: 40

約数和(自身を含む): 47483568

約数和(自身を除く): 27528128

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 688, 860, 1720, 3440, 5801, 11602, 23204, 29005, 46408, 58010, 92816, 116020, 232040, 249443, 464080, 498886, 997772, 1247215, 1995544, 2494430, 3991088, 4988860, 9977720, 19955440]

約数ペア:

[(1, 19955440), (2, 9977720), (4, 4988860), (5, 3991088), (8, 2494430), (10, 1995544), (16, 1247215), (20, 997772), (40, 498886), (43, 464080), (80, 249443), (86, 232040), (172, 116020), (215, 92816), (344, 58010), (430, 46408), (688, 29005), (860, 23204), (1720, 11602), (3440, 5801)]