21058660

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{349}}^1\times {\mathrm{431}}^1$

素因数の和:796

約数の個数: 48

約数和(自身を含む): 50803200

約数和(自身を除く): 29744540

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 349, 431, 698, 862, 1396, 1724, 1745, 2155, 2443, 3017, 3490, 4310, 4886, 6034, 6980, 8620, 9772, 12068, 12215, 15085, 24430, 30170, 48860, 60340, 150419, 300838, 601676, 752095, 1052933, 1504190, 2105866, 3008380, 4211732, 5264665, 10529330, 21058660]

約数ペア:

[(1, 21058660), (2, 10529330), (4, 5264665), (5, 4211732), (7, 3008380), (10, 2105866), (14, 1504190), (20, 1052933), (28, 752095), (35, 601676), (70, 300838), (140, 150419), (349, 60340), (431, 48860), (698, 30170), (862, 24430), (1396, 15085), (1724, 12215), (1745, 12068), (2155, 9772), (2443, 8620), (3017, 6980), (3490, 6034), (4310, 4886)]