18717561

素因数分解:

$3^5\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{197}}^1$

素因数の和:252

約数の個数: 48

約数和(自身を含む): 31135104

約数和(自身を除く): 12417543

約数列:

[1, 3, 9, 17, 23, 27, 51, 69, 81, 153, 197, 207, 243, 391, 459, 591, 621, 1173, 1377, 1773, 1863, 3349, 3519, 4131, 4531, 5319, 5589, 10047, 10557, 13593, 15957, 30141, 31671, 40779, 47871, 77027, 90423, 95013, 122337, 231081, 271269, 367011, 693243, 813807, 1101033, 2079729, 6239187, 18717561]

約数ペア:

[(1, 18717561), (3, 6239187), (9, 2079729), (17, 1101033), (23, 813807), (27, 693243), (51, 367011), (69, 271269), (81, 231081), (153, 122337), (197, 95013), (207, 90423), (243, 77027), (391, 47871), (459, 40779), (591, 31671), (621, 30141), (1173, 15957), (1377, 13593), (1773, 10557), (1863, 10047), (3349, 5589), (3519, 5319), (4131, 4531)]