18978876

素因数分解:

$2^2\times 3^2\times 7^3\times {\mathrm{29}}^1\times {\mathrm{53}}^1$

素因数の和:113

約数の個数: 144

約数和(自身を含む): 58968000

約数和(自身を除く): 39989124

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 29, 36, 42, 49, 53, 58, 63, 84, 87, 98, 106, 116, 126, 147, 159, 174, 196, 203, 212, 252, 261, 294, 318, 343, 348, 371, 406, 441, 477, 522, 588, 609, 636, 686, 742, 812, 882, 954, 1029, 1044, 1113, 1218, 1372, 1421, 1484, 1537, 1764, 1827, 1908, 2058, 2226, 2436, 2597, 2842, 3074, 3087, 3339, 3654, 4116, 4263, 4452, 4611, 5194, 5684, 6148, 6174, 6678, 7308, 7791, 8526, 9222, 9947, 10388, 10759, 12348, 12789, 13356, 13833, 15582, 17052, 18179, 18444, 19894, 21518, 23373, 25578, 27666, 29841, 31164, 32277, 36358, 39788, 43036, 46746, 51156, 54537, 55332, 59682, 64554, 72716, 75313, 89523, 93492, 96831, 109074, 119364, 129108, 150626, 163611, 179046, 193662, 218148, 225939, 301252, 327222, 358092, 387324, 451878, 527191, 654444, 677817, 903756, 1054382, 1355634, 1581573, 2108764, 2711268, 3163146, 4744719, 6326292, 9489438, 18978876]

約数ペア:

[(1, 18978876), (2, 9489438), (3, 6326292), (4, 4744719), (6, 3163146), (7, 2711268), (9, 2108764), (12, 1581573), (14, 1355634), (18, 1054382), (21, 903756), (28, 677817), (29, 654444), (36, 527191), (42, 451878), (49, 387324), (53, 358092), (58, 327222), (63, 301252), (84, 225939), (87, 218148), (98, 193662), (106, 179046), (116, 163611), (126, 150626), (147, 129108), (159, 119364), (174, 109074), (196, 96831), (203, 93492), (212, 89523), (252, 75313), (261, 72716), (294, 64554), (318, 59682), (343, 55332), (348, 54537), (371, 51156), (406, 46746), (441, 43036), (477, 39788), (522, 36358), (588, 32277), (609, 31164), (636, 29841), (686, 27666), (742, 25578), (812, 23373), (882, 21518), (954, 19894), (1029, 18444), (1044, 18179), (1113, 17052), (1218, 15582), (1372, 13833), (1421, 13356), (1484, 12789), (1537, 12348), (1764, 10759), (1827, 10388), (1908, 9947), (2058, 9222), (2226, 8526), (2436, 7791), (2597, 7308), (2842, 6678), (3074, 6174), (3087, 6148), (3339, 5684), (3654, 5194), (4116, 4611), (4263, 4452)]