20987010

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1$

素因数の和:113

約数の個数: 192

約数和(自身を含む): 66718080

約数和(自身を除く): 45731070

約数列:

[1, 2, 3, 5, 6, 9, 10, 11, 15, 17, 18, 22, 29, 30, 33, 34, 43, 45, 51, 55, 58, 66, 85, 86, 87, 90, 99, 102, 110, 129, 145, 153, 165, 170, 174, 187, 198, 215, 255, 258, 261, 290, 306, 319, 330, 374, 387, 430, 435, 473, 493, 495, 510, 522, 561, 638, 645, 731, 765, 774, 870, 935, 946, 957, 986, 990, 1122, 1247, 1290, 1305, 1419, 1462, 1479, 1530, 1595, 1683, 1870, 1914, 1935, 2193, 2365, 2465, 2494, 2610, 2805, 2838, 2871, 2958, 3190, 3366, 3655, 3741, 3870, 4257, 4386, 4437, 4730, 4785, 4930, 5423, 5610, 5742, 6235, 6579, 7095, 7310, 7395, 7482, 8041, 8415, 8514, 8874, 9570, 10846, 10965, 11223, 12470, 13158, 13717, 14190, 14355, 14790, 16082, 16269, 16830, 18705, 21199, 21285, 21930, 22185, 22446, 24123, 27115, 27434, 28710, 32538, 32895, 37410, 40205, 41151, 42398, 42570, 44370, 48246, 48807, 54230, 56115, 63597, 65790, 68585, 72369, 80410, 81345, 82302, 97614, 105995, 112230, 120615, 123453, 127194, 137170, 144738, 162690, 190791, 205755, 211990, 233189, 241230, 244035, 246906, 317985, 361845, 381582, 411510, 466378, 488070, 617265, 635970, 699567, 723690, 953955, 1165945, 1234530, 1399134, 1907910, 2098701, 2331890, 3497835, 4197402, 6995670, 10493505, 20987010]

約数ペア:

[(1, 20987010), (2, 10493505), (3, 6995670), (5, 4197402), (6, 3497835), (9, 2331890), (10, 2098701), (11, 1907910), (15, 1399134), (17, 1234530), (18, 1165945), (22, 953955), (29, 723690), (30, 699567), (33, 635970), (34, 617265), (43, 488070), (45, 466378), (51, 411510), (55, 381582), (58, 361845), (66, 317985), (85, 246906), (86, 244035), (87, 241230), (90, 233189), (99, 211990), (102, 205755), (110, 190791), (129, 162690), (145, 144738), (153, 137170), (165, 127194), (170, 123453), (174, 120615), (187, 112230), (198, 105995), (215, 97614), (255, 82302), (258, 81345), (261, 80410), (290, 72369), (306, 68585), (319, 65790), (330, 63597), (374, 56115), (387, 54230), (430, 48807), (435, 48246), (473, 44370), (493, 42570), (495, 42398), (510, 41151), (522, 40205), (561, 37410), (638, 32895), (645, 32538), (731, 28710), (765, 27434), (774, 27115), (870, 24123), (935, 22446), (946, 22185), (957, 21930), (986, 21285), (990, 21199), (1122, 18705), (1247, 16830), (1290, 16269), (1305, 16082), (1419, 14790), (1462, 14355), (1479, 14190), (1530, 13717), (1595, 13158), (1683, 12470), (1870, 11223), (1914, 10965), (1935, 10846), (2193, 9570), (2365, 8874), (2465, 8514), (2494, 8415), (2610, 8041), (2805, 7482), (2838, 7395), (2871, 7310), (2958, 7095), (3190, 6579), (3366, 6235), (3655, 5742), (3741, 5610), (3870, 5423), (4257, 4930), (4386, 4785), (4437, 4730)]