81451818

素因数分解:

$2^1\times 3^4\times 7^2\times {\mathrm{31}}^1\times {\mathrm{331}}^1$

素因数の和:390

約数の個数: 120

約数和(自身を含む): 219821184

約数和(自身を除く): 138369366

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 27, 31, 42, 49, 54, 62, 63, 81, 93, 98, 126, 147, 162, 186, 189, 217, 279, 294, 331, 378, 434, 441, 558, 567, 651, 662, 837, 882, 993, 1134, 1302, 1323, 1519, 1674, 1953, 1986, 2317, 2511, 2646, 2979, 3038, 3906, 3969, 4557, 4634, 5022, 5859, 5958, 6951, 7938, 8937, 9114, 10261, 11718, 13671, 13902, 16219, 17577, 17874, 20522, 20853, 26811, 27342, 30783, 32438, 35154, 41013, 41706, 48657, 53622, 61566, 62559, 71827, 82026, 92349, 97314, 123039, 125118, 143654, 145971, 184698, 187677, 215481, 246078, 277047, 291942, 375354, 430962, 437913, 502789, 554094, 646443, 831141, 875826, 1005578, 1292886, 1313739, 1508367, 1662282, 1939329, 2627478, 3016734, 3878658, 4525101, 5817987, 9050202, 11635974, 13575303, 27150606, 40725909, 81451818]

約数ペア:

[(1, 81451818), (2, 40725909), (3, 27150606), (6, 13575303), (7, 11635974), (9, 9050202), (14, 5817987), (18, 4525101), (21, 3878658), (27, 3016734), (31, 2627478), (42, 1939329), (49, 1662282), (54, 1508367), (62, 1313739), (63, 1292886), (81, 1005578), (93, 875826), (98, 831141), (126, 646443), (147, 554094), (162, 502789), (186, 437913), (189, 430962), (217, 375354), (279, 291942), (294, 277047), (331, 246078), (378, 215481), (434, 187677), (441, 184698), (558, 145971), (567, 143654), (651, 125118), (662, 123039), (837, 97314), (882, 92349), (993, 82026), (1134, 71827), (1302, 62559), (1323, 61566), (1519, 53622), (1674, 48657), (1953, 41706), (1986, 41013), (2317, 35154), (2511, 32438), (2646, 30783), (2979, 27342), (3038, 26811), (3906, 20853), (3969, 20522), (4557, 17874), (4634, 17577), (5022, 16219), (5859, 13902), (5958, 13671), (6951, 11718), (7938, 10261), (8937, 9114)]