20485885

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{239}}^1$

素因数の和:361

約数の個数: 32

約数和(自身を含む): 29491200

約数和(自身を除く): 9005315

約数列:

[1, 5, 7, 31, 35, 79, 155, 217, 239, 395, 553, 1085, 1195, 1673, 2449, 2765, 7409, 8365, 12245, 17143, 18881, 37045, 51863, 85715, 94405, 132167, 259315, 585311, 660835, 2926555, 4097177, 20485885]

約数ペア:

[(1, 20485885), (5, 4097177), (7, 2926555), (31, 660835), (35, 585311), (79, 259315), (155, 132167), (217, 94405), (239, 85715), (395, 51863), (553, 37045), (1085, 18881), (1195, 17143), (1673, 12245), (2449, 8365), (2765, 7409)]