20890660

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{21317}}^1$

素因数の和:21340

約数の個数: 36

約数和(自身を含む): 51035292

約数和(自身を除く): 30144632

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 21317, 42634, 85268, 106585, 149219, 213170, 298438, 426340, 596876, 746095, 1044533, 1492190, 2089066, 2984380, 4178132, 5222665, 10445330, 20890660]

約数ペア:

[(1, 20890660), (2, 10445330), (4, 5222665), (5, 4178132), (7, 2984380), (10, 2089066), (14, 1492190), (20, 1044533), (28, 746095), (35, 596876), (49, 426340), (70, 298438), (98, 213170), (140, 149219), (196, 106585), (245, 85268), (490, 42634), (980, 21317)]