20705881

素因数分解:

$7^3\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{67}}^1$

素因数の和:158

約数の個数: 32

約数和(自身を含む): 26438400

約数和(自身を除く): 5732519

約数列:

[1, 7, 17, 49, 53, 67, 119, 343, 371, 469, 833, 901, 1139, 2597, 3283, 3551, 5831, 6307, 7973, 18179, 22981, 24857, 44149, 55811, 60367, 173999, 309043, 390677, 422569, 1217993, 2957983, 20705881]

約数ペア:

[(1, 20705881), (7, 2957983), (17, 1217993), (49, 422569), (53, 390677), (67, 309043), (119, 173999), (343, 60367), (371, 55811), (469, 44149), (833, 24857), (901, 22981), (1139, 18179), (2597, 7973), (3283, 6307), (3551, 5831)]