18756661

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1$

素因数の和:154

約数の個数: 48

約数和(自身を含む): 26593920

約数和(自身を除く): 7837259

約数列:

[1, 7, 11, 17, 23, 49, 77, 89, 119, 161, 187, 253, 391, 539, 623, 833, 979, 1127, 1309, 1513, 1771, 2047, 2737, 4301, 4361, 6853, 9163, 10591, 12397, 14329, 16643, 19159, 22517, 30107, 34799, 47971, 74137, 100303, 116501, 157619, 210749, 243593, 382789, 815507, 1103333, 1705151, 2679523, 18756661]

約数ペア:

[(1, 18756661), (7, 2679523), (11, 1705151), (17, 1103333), (23, 815507), (49, 382789), (77, 243593), (89, 210749), (119, 157619), (161, 116501), (187, 100303), (253, 74137), (391, 47971), (539, 34799), (623, 30107), (833, 22517), (979, 19159), (1127, 16643), (1309, 14329), (1513, 12397), (1771, 10591), (2047, 9163), (2737, 6853), (4301, 4361)]