8731980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{349}}^1$

素因数の和:503

約数の個数: 72

約数和(自身を含む): 26754000

約数和(自身を除く): 18022020

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 139, 180, 278, 349, 417, 556, 695, 698, 834, 1047, 1251, 1390, 1396, 1668, 1745, 2085, 2094, 2502, 2780, 3141, 3490, 4170, 4188, 5004, 5235, 6255, 6282, 6980, 8340, 10470, 12510, 12564, 15705, 20940, 25020, 31410, 48511, 62820, 97022, 145533, 194044, 242555, 291066, 436599, 485110, 582132, 727665, 873198, 970220, 1455330, 1746396, 2182995, 2910660, 4365990, 8731980]

約数ペア:

[(1, 8731980), (2, 4365990), (3, 2910660), (4, 2182995), (5, 1746396), (6, 1455330), (9, 970220), (10, 873198), (12, 727665), (15, 582132), (18, 485110), (20, 436599), (30, 291066), (36, 242555), (45, 194044), (60, 145533), (90, 97022), (139, 62820), (180, 48511), (278, 31410), (349, 25020), (417, 20940), (556, 15705), (695, 12564), (698, 12510), (834, 10470), (1047, 8340), (1251, 6980), (1390, 6282), (1396, 6255), (1668, 5235), (1745, 5004), (2085, 4188), (2094, 4170), (2502, 3490), (2780, 3141)]