2157702940

素因数分解:

$2^2\times 5^1\times {\mathrm{331}}^1\times {\mathrm{397}}^1\times {\mathrm{821}}^1$

素因数の和:1558

約数の個数: 48

約数和(自身を含む): 4561863264

約数和(自身を除く): 2404160324

約数列:

[1, 2, 4, 5, 10, 20, 331, 397, 662, 794, 821, 1324, 1588, 1642, 1655, 1985, 3284, 3310, 3970, 4105, 6620, 7940, 8210, 16420, 131407, 262814, 271751, 325937, 525628, 543502, 651874, 657035, 1087004, 1303748, 1314070, 1358755, 1629685, 2628140, 2717510, 3259370, 5435020, 6518740, 107885147, 215770294, 431540588, 539425735, 1078851470, 2157702940]

約数ペア:

[(1, 2157702940), (2, 1078851470), (4, 539425735), (5, 431540588), (10, 215770294), (20, 107885147), (331, 6518740), (397, 5435020), (662, 3259370), (794, 2717510), (821, 2628140), (1324, 1629685), (1588, 1358755), (1642, 1314070), (1655, 1303748), (1985, 1087004), (3284, 657035), (3310, 651874), (3970, 543502), (4105, 525628), (6620, 325937), (7940, 271751), (8210, 262814), (16420, 131407)]