20780821635

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{76919}}^1$

素因数の和:77048

約数の個数: 64

約数和(自身を含む): 39698104320

約数和(自身を除く): 18917282685

約数列:

[1, 3, 5, 7, 15, 21, 31, 35, 83, 93, 105, 155, 217, 249, 415, 465, 581, 651, 1085, 1245, 1743, 2573, 2905, 3255, 7719, 8715, 12865, 18011, 38595, 54033, 76919, 90055, 230757, 270165, 384595, 538433, 1153785, 1615299, 2384489, 2692165, 6384277, 7153467, 8076495, 11922445, 16691423, 19152831, 31921385, 35767335, 44689939, 50074269, 83457115, 95764155, 134069817, 197912587, 223449695, 250371345, 593737761, 670349085, 989562935, 1385388109, 2968688805, 4156164327, 6926940545, 20780821635]

約数ペア:

[(1, 20780821635), (3, 6926940545), (5, 4156164327), (7, 2968688805), (15, 1385388109), (21, 989562935), (31, 670349085), (35, 593737761), (83, 250371345), (93, 223449695), (105, 197912587), (155, 134069817), (217, 95764155), (249, 83457115), (415, 50074269), (465, 44689939), (581, 35767335), (651, 31921385), (1085, 19152831), (1245, 16691423), (1743, 11922445), (2573, 8076495), (2905, 7153467), (3255, 6384277), (7719, 2692165), (8715, 2384489), (12865, 1615299), (18011, 1153785), (38595, 538433), (54033, 384595), (76919, 270165), (90055, 230757)]