20197660

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{1621}}^1$

素因数の和:1726

約数の個数: 48

約数和(自身を含む): 49049280

約数和(自身を除く): 28851620

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 89, 140, 178, 356, 445, 623, 890, 1246, 1621, 1780, 2492, 3115, 3242, 6230, 6484, 8105, 11347, 12460, 16210, 22694, 32420, 45388, 56735, 113470, 144269, 226940, 288538, 577076, 721345, 1009883, 1442690, 2019766, 2885380, 4039532, 5049415, 10098830, 20197660]

約数ペア:

[(1, 20197660), (2, 10098830), (4, 5049415), (5, 4039532), (7, 2885380), (10, 2019766), (14, 1442690), (20, 1009883), (28, 721345), (35, 577076), (70, 288538), (89, 226940), (140, 144269), (178, 113470), (356, 56735), (445, 45388), (623, 32420), (890, 22694), (1246, 16210), (1621, 12460), (1780, 11347), (2492, 8105), (3115, 6484), (3242, 6230)]