81143960

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{109}}^1\times {\mathrm{503}}^1$

素因数の和:660

約数の個数: 64

約数和(自身を含む): 189604800

約数和(自身を除く): 108460840

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 109, 148, 185, 218, 296, 370, 436, 503, 545, 740, 872, 1006, 1090, 1480, 2012, 2180, 2515, 4024, 4033, 4360, 5030, 8066, 10060, 16132, 18611, 20120, 20165, 32264, 37222, 40330, 54827, 74444, 80660, 93055, 109654, 148888, 161320, 186110, 219308, 274135, 372220, 438616, 548270, 744440, 1096540, 2028599, 2193080, 4057198, 8114396, 10142995, 16228792, 20285990, 40571980, 81143960]

約数ペア:

[(1, 81143960), (2, 40571980), (4, 20285990), (5, 16228792), (8, 10142995), (10, 8114396), (20, 4057198), (37, 2193080), (40, 2028599), (74, 1096540), (109, 744440), (148, 548270), (185, 438616), (218, 372220), (296, 274135), (370, 219308), (436, 186110), (503, 161320), (545, 148888), (740, 109654), (872, 93055), (1006, 80660), (1090, 74444), (1480, 54827), (2012, 40330), (2180, 37222), (2515, 32264), (4024, 20165), (4033, 20120), (4360, 18611), (5030, 16132), (8066, 10060)]