20015980

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{821}}^1$

素因数の和:906

約数の個数: 48

約数和(自身を含む): 44743104

約数和(自身を除く): 24727124

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 53, 92, 106, 115, 212, 230, 265, 460, 530, 821, 1060, 1219, 1642, 2438, 3284, 4105, 4876, 6095, 8210, 12190, 16420, 18883, 24380, 37766, 43513, 75532, 87026, 94415, 174052, 188830, 217565, 377660, 435130, 870260, 1000799, 2001598, 4003196, 5003995, 10007990, 20015980]

約数ペア:

[(1, 20015980), (2, 10007990), (4, 5003995), (5, 4003196), (10, 2001598), (20, 1000799), (23, 870260), (46, 435130), (53, 377660), (92, 217565), (106, 188830), (115, 174052), (212, 94415), (230, 87026), (265, 75532), (460, 43513), (530, 37766), (821, 24380), (1060, 18883), (1219, 16420), (1642, 12190), (2438, 8210), (3284, 6095), (4105, 4876)]