20440

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{73}}^1$

素因数の和:91

約数の個数: 32

約数和(自身を含む): 53280

約数和(自身を除く): 32840

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 73, 140, 146, 280, 292, 365, 511, 584, 730, 1022, 1460, 2044, 2555, 2920, 4088, 5110, 10220, 20440]

約数ペア:

[(1, 20440), (2, 10220), (4, 5110), (5, 4088), (7, 2920), (8, 2555), (10, 2044), (14, 1460), (20, 1022), (28, 730), (35, 584), (40, 511), (56, 365), (70, 292), (73, 280), (140, 146)]