205140

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{263}}^1$

素因数の和:288

約数の個数: 48

約数和(自身を含む): 620928

約数和(自身を除く): 415788

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 263, 390, 526, 780, 789, 1052, 1315, 1578, 2630, 3156, 3419, 3945, 5260, 6838, 7890, 10257, 13676, 15780, 17095, 20514, 34190, 41028, 51285, 68380, 102570, 205140]

約数ペア:

[(1, 205140), (2, 102570), (3, 68380), (4, 51285), (5, 41028), (6, 34190), (10, 20514), (12, 17095), (13, 15780), (15, 13676), (20, 10257), (26, 7890), (30, 6838), (39, 5260), (52, 3945), (60, 3419), (65, 3156), (78, 2630), (130, 1578), (156, 1315), (195, 1052), (260, 789), (263, 780), (390, 526)]