21326620

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{347}}^1\times {\mathrm{439}}^1$

素因数の和:802

約数の個数: 48

約数和(自身を含む): 51448320

約数和(自身を除く): 30121700

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 347, 439, 694, 878, 1388, 1735, 1756, 2195, 2429, 3073, 3470, 4390, 4858, 6146, 6940, 8780, 9716, 12145, 12292, 15365, 24290, 30730, 48580, 61460, 152333, 304666, 609332, 761665, 1066331, 1523330, 2132662, 3046660, 4265324, 5331655, 10663310, 21326620]

約数ペア:

[(1, 21326620), (2, 10663310), (4, 5331655), (5, 4265324), (7, 3046660), (10, 2132662), (14, 1523330), (20, 1066331), (28, 761665), (35, 609332), (70, 304666), (140, 152333), (347, 61460), (439, 48580), (694, 30730), (878, 24290), (1388, 15365), (1735, 12292), (1756, 12145), (2195, 9716), (2429, 8780), (3073, 6940), (3470, 6146), (4390, 4858)]