20165240

素因数分解:

$2^3\times 5^1\times {\mathrm{311}}^1\times {\mathrm{1621}}^1$

素因数の和:1943

約数の個数: 32

約数和(自身を含む): 45545760

約数和(自身を除く): 25380520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 311, 622, 1244, 1555, 1621, 2488, 3110, 3242, 6220, 6484, 8105, 12440, 12968, 16210, 32420, 64840, 504131, 1008262, 2016524, 2520655, 4033048, 5041310, 10082620, 20165240]

約数ペア:

[(1, 20165240), (2, 10082620), (4, 5041310), (5, 4033048), (8, 2520655), (10, 2016524), (20, 1008262), (40, 504131), (311, 64840), (622, 32420), (1244, 16210), (1555, 12968), (1621, 12440), (2488, 8105), (3110, 6484), (3242, 6220)]