21644980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{349}}^1\times {\mathrm{443}}^1$

素因数の和:808

約数の個数: 48

約数和(自身を含む): 52214400

約数和(自身を除く): 30569420

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 349, 443, 698, 886, 1396, 1745, 1772, 2215, 2443, 3101, 3490, 4430, 4886, 6202, 6980, 8860, 9772, 12215, 12404, 15505, 24430, 31010, 48860, 62020, 154607, 309214, 618428, 773035, 1082249, 1546070, 2164498, 3092140, 4328996, 5411245, 10822490, 21644980]

約数ペア:

[(1, 21644980), (2, 10822490), (4, 5411245), (5, 4328996), (7, 3092140), (10, 2164498), (14, 1546070), (20, 1082249), (28, 773035), (35, 618428), (70, 309214), (140, 154607), (349, 62020), (443, 48860), (698, 31010), (886, 24430), (1396, 15505), (1745, 12404), (1772, 12215), (2215, 9772), (2443, 8860), (3101, 6980), (3490, 6202), (4430, 4886)]