21984340

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{22433}}^1$

素因数の和:22456

約数の個数: 36

約数和(自身を含む): 53706996

約数和(自身を除く): 31722656

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 22433, 44866, 89732, 112165, 157031, 224330, 314062, 448660, 628124, 785155, 1099217, 1570310, 2198434, 3140620, 4396868, 5496085, 10992170, 21984340]

約数ペア:

[(1, 21984340), (2, 10992170), (4, 5496085), (5, 4396868), (7, 3140620), (10, 2198434), (14, 1570310), (20, 1099217), (28, 785155), (35, 628124), (49, 448660), (70, 314062), (98, 224330), (140, 157031), (196, 112165), (245, 89732), (490, 44866), (980, 22433)]