19723240

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{11467}}^1$

素因数の和:11521

約数の個数: 32

約数和(自身を含む): 45413280

約数和(自身を除く): 25690040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 11467, 22934, 45868, 57335, 91736, 114670, 229340, 458680, 493081, 986162, 1972324, 2465405, 3944648, 4930810, 9861620, 19723240]

約数ペア:

[(1, 19723240), (2, 9861620), (4, 4930810), (5, 3944648), (8, 2465405), (10, 1972324), (20, 986162), (40, 493081), (43, 458680), (86, 229340), (172, 114670), (215, 91736), (344, 57335), (430, 45868), (860, 22934), (1720, 11467)]