81655560

素因数分解:

$2^3\times 3^3\times 5^1\times 7^2\times {\mathrm{1543}}^1$

素因数の和:1577

約数の個数: 192

約数和(自身を含む): 316828800

約数和(自身を除く): 235173240

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 18, 20, 21, 24, 27, 28, 30, 35, 36, 40, 42, 45, 49, 54, 56, 60, 63, 70, 72, 84, 90, 98, 105, 108, 120, 126, 135, 140, 147, 168, 180, 189, 196, 210, 216, 245, 252, 270, 280, 294, 315, 360, 378, 392, 420, 441, 490, 504, 540, 588, 630, 735, 756, 840, 882, 945, 980, 1080, 1176, 1260, 1323, 1470, 1512, 1543, 1764, 1890, 1960, 2205, 2520, 2646, 2940, 3086, 3528, 3780, 4410, 4629, 5292, 5880, 6172, 6615, 7560, 7715, 8820, 9258, 10584, 10801, 12344, 13230, 13887, 15430, 17640, 18516, 21602, 23145, 26460, 27774, 30860, 32403, 37032, 41661, 43204, 46290, 52920, 54005, 55548, 61720, 64806, 69435, 75607, 83322, 86408, 92580, 97209, 108010, 111096, 129612, 138870, 151214, 162015, 166644, 185160, 194418, 208305, 216020, 226821, 259224, 277740, 291627, 302428, 324030, 333288, 378035, 388836, 416610, 432040, 453642, 486045, 555480, 583254, 604856, 648060, 680463, 756070, 777672, 833220, 907284, 972090, 1134105, 1166508, 1296120, 1360926, 1458135, 1512140, 1666440, 1814568, 1944180, 2041389, 2268210, 2333016, 2721852, 2916270, 3024280, 3402315, 3888360, 4082778, 4536420, 5443704, 5832540, 6804630, 8165556, 9072840, 10206945, 11665080, 13609260, 16331112, 20413890, 27218520, 40827780, 81655560]

約数ペア:

[(1, 81655560), (2, 40827780), (3, 27218520), (4, 20413890), (5, 16331112), (6, 13609260), (7, 11665080), (8, 10206945), (9, 9072840), (10, 8165556), (12, 6804630), (14, 5832540), (15, 5443704), (18, 4536420), (20, 4082778), (21, 3888360), (24, 3402315), (27, 3024280), (28, 2916270), (30, 2721852), (35, 2333016), (36, 2268210), (40, 2041389), (42, 1944180), (45, 1814568), (49, 1666440), (54, 1512140), (56, 1458135), (60, 1360926), (63, 1296120), (70, 1166508), (72, 1134105), (84, 972090), (90, 907284), (98, 833220), (105, 777672), (108, 756070), (120, 680463), (126, 648060), (135, 604856), (140, 583254), (147, 555480), (168, 486045), (180, 453642), (189, 432040), (196, 416610), (210, 388836), (216, 378035), (245, 333288), (252, 324030), (270, 302428), (280, 291627), (294, 277740), (315, 259224), (360, 226821), (378, 216020), (392, 208305), (420, 194418), (441, 185160), (490, 166644), (504, 162015), (540, 151214), (588, 138870), (630, 129612), (735, 111096), (756, 108010), (840, 97209), (882, 92580), (945, 86408), (980, 83322), (1080, 75607), (1176, 69435), (1260, 64806), (1323, 61720), (1470, 55548), (1512, 54005), (1543, 52920), (1764, 46290), (1890, 43204), (1960, 41661), (2205, 37032), (2520, 32403), (2646, 30860), (2940, 27774), (3086, 26460), (3528, 23145), (3780, 21602), (4410, 18516), (4629, 17640), (5292, 15430), (5880, 13887), (6172, 13230), (6615, 12344), (7560, 10801), (7715, 10584), (8820, 9258)]