20489791

素因数分解:

$7^3\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1$

素因数の和:140

約数の個数: 32

約数和(自身を含む): 25804800

約数和(自身を除く): 5315009

約数列:

[1, 7, 31, 41, 47, 49, 217, 287, 329, 343, 1271, 1457, 1519, 1927, 2009, 2303, 8897, 10199, 10633, 13489, 14063, 16121, 59737, 62279, 71393, 94423, 418159, 435953, 499751, 660961, 2927113, 20489791]

約数ペア:

[(1, 20489791), (7, 2927113), (31, 660961), (41, 499751), (47, 435953), (49, 418159), (217, 94423), (287, 71393), (329, 62279), (343, 59737), (1271, 16121), (1457, 14063), (1519, 13489), (1927, 10633), (2009, 10199), (2303, 8897)]