21528540

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{83}}^1\times {\mathrm{131}}^1$

素因数の和:240

約数の個数: 144

約数和(自身を含む): 72648576

約数和(自身を除く): 51120036

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, 83, 90, 99, 110, 131, 132, 165, 166, 180, 198, 220, 249, 262, 330, 332, 393, 396, 415, 495, 498, 524, 655, 660, 747, 786, 830, 913, 990, 996, 1179, 1245, 1310, 1441, 1494, 1572, 1660, 1826, 1965, 1980, 2358, 2490, 2620, 2739, 2882, 2988, 3652, 3735, 3930, 4323, 4565, 4716, 4980, 5478, 5764, 5895, 7205, 7470, 7860, 8217, 8646, 9130, 10873, 10956, 11790, 12969, 13695, 14410, 14940, 16434, 17292, 18260, 21615, 21746, 23580, 25938, 27390, 28820, 32619, 32868, 41085, 43230, 43492, 51876, 54365, 54780, 64845, 65238, 82170, 86460, 97857, 108730, 119603, 129690, 130476, 163095, 164340, 195714, 217460, 239206, 259380, 326190, 358809, 391428, 478412, 489285, 598015, 652380, 717618, 978570, 1076427, 1196030, 1435236, 1794045, 1957140, 2152854, 2392060, 3588090, 4305708, 5382135, 7176180, 10764270, 21528540]

約数ペア:

[(1, 21528540), (2, 10764270), (3, 7176180), (4, 5382135), (5, 4305708), (6, 3588090), (9, 2392060), (10, 2152854), (11, 1957140), (12, 1794045), (15, 1435236), (18, 1196030), (20, 1076427), (22, 978570), (30, 717618), (33, 652380), (36, 598015), (44, 489285), (45, 478412), (55, 391428), (60, 358809), (66, 326190), (83, 259380), (90, 239206), (99, 217460), (110, 195714), (131, 164340), (132, 163095), (165, 130476), (166, 129690), (180, 119603), (198, 108730), (220, 97857), (249, 86460), (262, 82170), (330, 65238), (332, 64845), (393, 54780), (396, 54365), (415, 51876), (495, 43492), (498, 43230), (524, 41085), (655, 32868), (660, 32619), (747, 28820), (786, 27390), (830, 25938), (913, 23580), (990, 21746), (996, 21615), (1179, 18260), (1245, 17292), (1310, 16434), (1441, 14940), (1494, 14410), (1572, 13695), (1660, 12969), (1826, 11790), (1965, 10956), (1980, 10873), (2358, 9130), (2490, 8646), (2620, 8217), (2739, 7860), (2882, 7470), (2988, 7205), (3652, 5895), (3735, 5764), (3930, 5478), (4323, 4980), (4565, 4716)]