81738160

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{227}}^1\times {\mathrm{643}}^1$

素因数の和:890

約数の個数: 80

約数和(自身を含む): 218486016

約数和(自身を除く): 136747856

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 227, 280, 454, 560, 643, 908, 1135, 1286, 1589, 1816, 2270, 2572, 3178, 3215, 3632, 4501, 4540, 5144, 6356, 6430, 7945, 9002, 9080, 10288, 12712, 12860, 15890, 18004, 18160, 22505, 25424, 25720, 31780, 36008, 45010, 51440, 63560, 72016, 90020, 127120, 145961, 180040, 291922, 360080, 583844, 729805, 1021727, 1167688, 1459610, 2043454, 2335376, 2919220, 4086908, 5108635, 5838440, 8173816, 10217270, 11676880, 16347632, 20434540, 40869080, 81738160]

約数ペア:

[(1, 81738160), (2, 40869080), (4, 20434540), (5, 16347632), (7, 11676880), (8, 10217270), (10, 8173816), (14, 5838440), (16, 5108635), (20, 4086908), (28, 2919220), (35, 2335376), (40, 2043454), (56, 1459610), (70, 1167688), (80, 1021727), (112, 729805), (140, 583844), (227, 360080), (280, 291922), (454, 180040), (560, 145961), (643, 127120), (908, 90020), (1135, 72016), (1286, 63560), (1589, 51440), (1816, 45010), (2270, 36008), (2572, 31780), (3178, 25720), (3215, 25424), (3632, 22505), (4501, 18160), (4540, 18004), (5144, 15890), (6356, 12860), (6430, 12712), (7945, 10288), (9002, 9080)]