19171120

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{5573}}^1$

素因数の和:5629

約数の個数: 40

約数和(自身を含む): 45617616

約数和(自身を除く): 26446496

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 172, 215, 344, 430, 688, 860, 1720, 3440, 5573, 11146, 22292, 27865, 44584, 55730, 89168, 111460, 222920, 239639, 445840, 479278, 958556, 1198195, 1917112, 2396390, 3834224, 4792780, 9585560, 19171120]

約数ペア:

[(1, 19171120), (2, 9585560), (4, 4792780), (5, 3834224), (8, 2396390), (10, 1917112), (16, 1198195), (20, 958556), (40, 479278), (43, 445840), (80, 239639), (86, 222920), (172, 111460), (215, 89168), (344, 55730), (430, 44584), (688, 27865), (860, 22292), (1720, 11146), (3440, 5573)]