20473880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{73121}}^1$

素因数の和:73139

約数の個数: 32

約数和(自身を含む): 52647840

約数和(自身を除く): 32173960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 73121, 146242, 292484, 365605, 511847, 584968, 731210, 1023694, 1462420, 2047388, 2559235, 2924840, 4094776, 5118470, 10236940, 20473880]

約数ペア:

[(1, 20473880), (2, 10236940), (4, 5118470), (5, 4094776), (7, 2924840), (8, 2559235), (10, 2047388), (14, 1462420), (20, 1023694), (28, 731210), (35, 584968), (40, 511847), (56, 365605), (70, 292484), (140, 146242), (280, 73121)]