20556795

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{157}}^1$

素因数の和:244

約数の個数: 64

約数和(自身を含む): 40043520

約数和(自身を除く): 19486725

約数列:

[1, 3, 5, 7, 15, 21, 29, 35, 43, 87, 105, 129, 145, 157, 203, 215, 301, 435, 471, 609, 645, 785, 903, 1015, 1099, 1247, 1505, 2355, 3045, 3297, 3741, 4515, 4553, 5495, 6235, 6751, 8729, 13659, 16485, 18705, 20253, 22765, 26187, 31871, 33755, 43645, 47257, 68295, 95613, 101265, 130935, 141771, 159355, 195779, 236285, 478065, 587337, 708855, 978895, 1370453, 2936685, 4111359, 6852265, 20556795]

約数ペア:

[(1, 20556795), (3, 6852265), (5, 4111359), (7, 2936685), (15, 1370453), (21, 978895), (29, 708855), (35, 587337), (43, 478065), (87, 236285), (105, 195779), (129, 159355), (145, 141771), (157, 130935), (203, 101265), (215, 95613), (301, 68295), (435, 47257), (471, 43645), (609, 33755), (645, 31871), (785, 26187), (903, 22765), (1015, 20253), (1099, 18705), (1247, 16485), (1505, 13659), (2355, 8729), (3045, 6751), (3297, 6235), (3741, 5495), (4515, 4553)]