18415980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{131}}^1$

素因数の和:228

約数の個数: 144

約数和(自身を含む): 62270208

約数和(自身を除く): 43854228

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 30, 33, 36, 44, 45, 55, 60, 66, 71, 90, 99, 110, 131, 132, 142, 165, 180, 198, 213, 220, 262, 284, 330, 355, 393, 396, 426, 495, 524, 639, 655, 660, 710, 781, 786, 852, 990, 1065, 1179, 1278, 1310, 1420, 1441, 1562, 1572, 1965, 1980, 2130, 2343, 2358, 2556, 2620, 2882, 3124, 3195, 3905, 3930, 4260, 4323, 4686, 4716, 5764, 5895, 6390, 7029, 7205, 7810, 7860, 8646, 9301, 9372, 11715, 11790, 12780, 12969, 14058, 14410, 15620, 17292, 18602, 21615, 23430, 23580, 25938, 27903, 28116, 28820, 35145, 37204, 43230, 46505, 46860, 51876, 55806, 64845, 70290, 83709, 86460, 93010, 102311, 111612, 129690, 139515, 140580, 167418, 186020, 204622, 259380, 279030, 306933, 334836, 409244, 418545, 511555, 558060, 613866, 837090, 920799, 1023110, 1227732, 1534665, 1674180, 1841598, 2046220, 3069330, 3683196, 4603995, 6138660, 9207990, 18415980]

約数ペア:

[(1, 18415980), (2, 9207990), (3, 6138660), (4, 4603995), (5, 3683196), (6, 3069330), (9, 2046220), (10, 1841598), (11, 1674180), (12, 1534665), (15, 1227732), (18, 1023110), (20, 920799), (22, 837090), (30, 613866), (33, 558060), (36, 511555), (44, 418545), (45, 409244), (55, 334836), (60, 306933), (66, 279030), (71, 259380), (90, 204622), (99, 186020), (110, 167418), (131, 140580), (132, 139515), (142, 129690), (165, 111612), (180, 102311), (198, 93010), (213, 86460), (220, 83709), (262, 70290), (284, 64845), (330, 55806), (355, 51876), (393, 46860), (396, 46505), (426, 43230), (495, 37204), (524, 35145), (639, 28820), (655, 28116), (660, 27903), (710, 25938), (781, 23580), (786, 23430), (852, 21615), (990, 18602), (1065, 17292), (1179, 15620), (1278, 14410), (1310, 14058), (1420, 12969), (1441, 12780), (1562, 11790), (1572, 11715), (1965, 9372), (1980, 9301), (2130, 8646), (2343, 7860), (2358, 7810), (2556, 7205), (2620, 7029), (2882, 6390), (3124, 5895), (3195, 5764), (3905, 4716), (3930, 4686), (4260, 4323)]