81454520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{251}}^1$

素因数の和:349

約数の個数: 128

約数和(自身を含む): 224985600

約数和(自身を除く): 143531080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 19, 20, 28, 35, 38, 40, 56, 61, 70, 76, 95, 122, 133, 140, 152, 190, 244, 251, 266, 280, 305, 380, 427, 488, 502, 532, 610, 665, 760, 854, 1004, 1064, 1159, 1220, 1255, 1330, 1708, 1757, 2008, 2135, 2318, 2440, 2510, 2660, 3416, 3514, 4270, 4636, 4769, 5020, 5320, 5795, 7028, 8113, 8540, 8785, 9272, 9538, 10040, 11590, 14056, 15311, 16226, 17080, 17570, 19076, 23180, 23845, 30622, 32452, 33383, 35140, 38152, 40565, 46360, 47690, 61244, 64904, 66766, 70280, 76555, 81130, 95380, 107177, 122488, 133532, 153110, 162260, 166915, 190760, 214354, 267064, 290909, 306220, 324520, 333830, 428708, 535885, 581818, 612440, 667660, 857416, 1071770, 1163636, 1335320, 1454545, 2036363, 2143540, 2327272, 2909090, 4072726, 4287080, 5818180, 8145452, 10181815, 11636360, 16290904, 20363630, 40727260, 81454520]

約数ペア:

[(1, 81454520), (2, 40727260), (4, 20363630), (5, 16290904), (7, 11636360), (8, 10181815), (10, 8145452), (14, 5818180), (19, 4287080), (20, 4072726), (28, 2909090), (35, 2327272), (38, 2143540), (40, 2036363), (56, 1454545), (61, 1335320), (70, 1163636), (76, 1071770), (95, 857416), (122, 667660), (133, 612440), (140, 581818), (152, 535885), (190, 428708), (244, 333830), (251, 324520), (266, 306220), (280, 290909), (305, 267064), (380, 214354), (427, 190760), (488, 166915), (502, 162260), (532, 153110), (610, 133532), (665, 122488), (760, 107177), (854, 95380), (1004, 81130), (1064, 76555), (1159, 70280), (1220, 66766), (1255, 64904), (1330, 61244), (1708, 47690), (1757, 46360), (2008, 40565), (2135, 38152), (2318, 35140), (2440, 33383), (2510, 32452), (2660, 30622), (3416, 23845), (3514, 23180), (4270, 19076), (4636, 17570), (4769, 17080), (5020, 16226), (5320, 15311), (5795, 14056), (7028, 11590), (8113, 10040), (8540, 9538), (8785, 9272)]