18507780

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{229}}^1\times {\mathrm{449}}^1$

素因数の和:693

約数の個数: 72

約数和(自身を含む): 56511000

約数和(自身を除く): 38003220

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 229, 449, 458, 687, 898, 916, 1145, 1347, 1374, 1796, 2061, 2245, 2290, 2694, 2748, 3435, 4041, 4122, 4490, 4580, 5388, 6735, 6870, 8082, 8244, 8980, 10305, 13470, 13740, 16164, 20205, 20610, 26940, 40410, 41220, 80820, 102821, 205642, 308463, 411284, 514105, 616926, 925389, 1028210, 1233852, 1542315, 1850778, 2056420, 3084630, 3701556, 4626945, 6169260, 9253890, 18507780]

約数ペア:

[(1, 18507780), (2, 9253890), (3, 6169260), (4, 4626945), (5, 3701556), (6, 3084630), (9, 2056420), (10, 1850778), (12, 1542315), (15, 1233852), (18, 1028210), (20, 925389), (30, 616926), (36, 514105), (45, 411284), (60, 308463), (90, 205642), (180, 102821), (229, 80820), (449, 41220), (458, 40410), (687, 26940), (898, 20610), (916, 20205), (1145, 16164), (1347, 13740), (1374, 13470), (1796, 10305), (2061, 8980), (2245, 8244), (2290, 8082), (2694, 6870), (2748, 6735), (3435, 5388), (4041, 4580), (4122, 4490)]