20965480

素因数分解:

$2^3\times 5^1\times {\mathrm{557}}^1\times {\mathrm{941}}^1$

素因数の和:1509

約数の個数: 32

約数和(自身を含む): 47307240

約数和(自身を除く): 26341760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 557, 941, 1114, 1882, 2228, 2785, 3764, 4456, 4705, 5570, 7528, 9410, 11140, 18820, 22280, 37640, 524137, 1048274, 2096548, 2620685, 4193096, 5241370, 10482740, 20965480]

約数ペア:

[(1, 20965480), (2, 10482740), (4, 5241370), (5, 4193096), (8, 2620685), (10, 2096548), (20, 1048274), (40, 524137), (557, 37640), (941, 22280), (1114, 18820), (1882, 11140), (2228, 9410), (2785, 7528), (3764, 5570), (4456, 4705)]