81215820

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{1499}}^1$

素因数の和:1564

約数の個数: 144

約数和(自身を含む): 288288000

約数和(自身を除く): 207072180

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 43, 45, 60, 63, 70, 84, 86, 90, 105, 126, 129, 140, 172, 180, 210, 215, 252, 258, 301, 315, 387, 420, 430, 516, 602, 630, 645, 774, 860, 903, 1204, 1260, 1290, 1499, 1505, 1548, 1806, 1935, 2580, 2709, 2998, 3010, 3612, 3870, 4497, 4515, 5418, 5996, 6020, 7495, 7740, 8994, 9030, 10493, 10836, 13491, 13545, 14990, 17988, 18060, 20986, 22485, 26982, 27090, 29980, 31479, 41972, 44970, 52465, 53964, 54180, 62958, 64457, 67455, 89940, 94437, 104930, 125916, 128914, 134910, 157395, 188874, 193371, 209860, 257828, 269820, 314790, 322285, 377748, 386742, 451199, 472185, 580113, 629580, 644570, 773484, 902398, 944370, 966855, 1160226, 1289140, 1353597, 1804796, 1888740, 1933710, 2255995, 2320452, 2707194, 2900565, 3867420, 4060791, 4511990, 5414388, 5801130, 6767985, 8121582, 9023980, 11602260, 13535970, 16243164, 20303955, 27071940, 40607910, 81215820]

約数ペア:

[(1, 81215820), (2, 40607910), (3, 27071940), (4, 20303955), (5, 16243164), (6, 13535970), (7, 11602260), (9, 9023980), (10, 8121582), (12, 6767985), (14, 5801130), (15, 5414388), (18, 4511990), (20, 4060791), (21, 3867420), (28, 2900565), (30, 2707194), (35, 2320452), (36, 2255995), (42, 1933710), (43, 1888740), (45, 1804796), (60, 1353597), (63, 1289140), (70, 1160226), (84, 966855), (86, 944370), (90, 902398), (105, 773484), (126, 644570), (129, 629580), (140, 580113), (172, 472185), (180, 451199), (210, 386742), (215, 377748), (252, 322285), (258, 314790), (301, 269820), (315, 257828), (387, 209860), (420, 193371), (430, 188874), (516, 157395), (602, 134910), (630, 128914), (645, 125916), (774, 104930), (860, 94437), (903, 89940), (1204, 67455), (1260, 64457), (1290, 62958), (1499, 54180), (1505, 53964), (1548, 52465), (1806, 44970), (1935, 41972), (2580, 31479), (2709, 29980), (2998, 27090), (3010, 26982), (3612, 22485), (3870, 20986), (4497, 18060), (4515, 17988), (5418, 14990), (5996, 13545), (6020, 13491), (7495, 10836), (7740, 10493), (8994, 9030)]