81260540

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{1549}}^1$

素因数の和:1662

約数の個数: 48

約数和(自身を含む): 177592800

約数和(自身を除く): 96332260

約数列:

[1, 2, 4, 5, 10, 20, 43, 61, 86, 122, 172, 215, 244, 305, 430, 610, 860, 1220, 1549, 2623, 3098, 5246, 6196, 7745, 10492, 13115, 15490, 26230, 30980, 52460, 66607, 94489, 133214, 188978, 266428, 333035, 377956, 472445, 666070, 944890, 1332140, 1889780, 4063027, 8126054, 16252108, 20315135, 40630270, 81260540]

約数ペア:

[(1, 81260540), (2, 40630270), (4, 20315135), (5, 16252108), (10, 8126054), (20, 4063027), (43, 1889780), (61, 1332140), (86, 944890), (122, 666070), (172, 472445), (215, 377956), (244, 333035), (305, 266428), (430, 188978), (610, 133214), (860, 94489), (1220, 66607), (1549, 52460), (2623, 30980), (3098, 26230), (5246, 15490), (6196, 13115), (7745, 10492)]