20408702979

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{619}}^1\times {\mathrm{42433}}^1$

素因数の和:43099

約数の個数: 32

約数和(自身を含む): 31991841280

約数和(自身を除く): 11583138301

約数列:

[1, 3, 7, 21, 37, 111, 259, 619, 777, 1857, 4333, 12999, 22903, 42433, 68709, 127299, 160321, 297031, 480963, 891093, 1570021, 4710063, 10990147, 26266027, 32970441, 78798081, 183862189, 551586567, 971842999, 2915528997, 6802900993, 20408702979]

約数ペア:

[(1, 20408702979), (3, 6802900993), (7, 2915528997), (21, 971842999), (37, 551586567), (111, 183862189), (259, 78798081), (619, 32970441), (777, 26266027), (1857, 10990147), (4333, 4710063), (12999, 1570021), (22903, 891093), (42433, 480963), (68709, 297031), (127299, 160321)]