18681313

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{197}}^1$

素因数の和:277

約数の個数: 32

約数和(自身を含む): 24330240

約数和(自身を除く): 5648927

約数列:

[1, 7, 19, 23, 31, 133, 161, 197, 217, 437, 589, 713, 1379, 3059, 3743, 4123, 4531, 4991, 6107, 13547, 26201, 31717, 42749, 86089, 94829, 116033, 140461, 602623, 812231, 983227, 2668759, 18681313]

約数ペア:

[(1, 18681313), (7, 2668759), (19, 983227), (23, 812231), (31, 602623), (133, 140461), (161, 116033), (197, 94829), (217, 86089), (437, 42749), (589, 31717), (713, 26201), (1379, 13547), (3059, 6107), (3743, 4991), (4123, 4531)]