81508140

素因数分解:

$2^2\times 3^3\times 5^1\times 7^1\times {\mathrm{21563}}^1$

素因数の和:21588

約数の個数: 96

約数和(自身を含む): 289820160

約数和(自身を除く): 208312020

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 27, 28, 30, 35, 36, 42, 45, 54, 60, 63, 70, 84, 90, 105, 108, 126, 135, 140, 180, 189, 210, 252, 270, 315, 378, 420, 540, 630, 756, 945, 1260, 1890, 3780, 21563, 43126, 64689, 86252, 107815, 129378, 150941, 194067, 215630, 258756, 301882, 323445, 388134, 431260, 452823, 582201, 603764, 646890, 754705, 776268, 905646, 970335, 1164402, 1293780, 1358469, 1509410, 1811292, 1940670, 2264115, 2328804, 2716938, 2911005, 3018820, 3881340, 4075407, 4528230, 5433876, 5822010, 6792345, 8150814, 9056460, 11644020, 13584690, 16301628, 20377035, 27169380, 40754070, 81508140]

約数ペア:

[(1, 81508140), (2, 40754070), (3, 27169380), (4, 20377035), (5, 16301628), (6, 13584690), (7, 11644020), (9, 9056460), (10, 8150814), (12, 6792345), (14, 5822010), (15, 5433876), (18, 4528230), (20, 4075407), (21, 3881340), (27, 3018820), (28, 2911005), (30, 2716938), (35, 2328804), (36, 2264115), (42, 1940670), (45, 1811292), (54, 1509410), (60, 1358469), (63, 1293780), (70, 1164402), (84, 970335), (90, 905646), (105, 776268), (108, 754705), (126, 646890), (135, 603764), (140, 582201), (180, 452823), (189, 431260), (210, 388134), (252, 323445), (270, 301882), (315, 258756), (378, 215630), (420, 194067), (540, 150941), (630, 129378), (756, 107815), (945, 86252), (1260, 64689), (1890, 43126), (3780, 21563)]