21509460

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{397}}^1$

素因数の和:462

約数の個数: 144

約数和(自身を含む): 76492416

約数和(自身を除く): 54982956

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, 397, 420, 430, 516, 602, 630, 645, 774, 794, 860, 903, 1191, 1204, 1260, 1290, 1505, 1548, 1588, 1806, 1935, 1985, 2382, 2580, 2709, 2779, 3010, 3573, 3612, 3870, 3970, 4515, 4764, 5418, 5558, 5955, 6020, 7146, 7740, 7940, 8337, 9030, 10836, 11116, 11910, 13545, 13895, 14292, 16674, 17071, 17865, 18060, 23820, 25011, 27090, 27790, 33348, 34142, 35730, 41685, 50022, 51213, 54180, 55580, 68284, 71460, 83370, 85355, 100044, 102426, 119497, 125055, 153639, 166740, 170710, 204852, 238994, 250110, 256065, 307278, 341420, 358491, 477988, 500220, 512130, 597485, 614556, 716982, 768195, 1024260, 1075473, 1194970, 1433964, 1536390, 1792455, 2150946, 2389940, 3072780, 3584910, 4301892, 5377365, 7169820, 10754730, 21509460]

約数ペア:

[(1, 21509460), (2, 10754730), (3, 7169820), (4, 5377365), (5, 4301892), (6, 3584910), (7, 3072780), (9, 2389940), (10, 2150946), (12, 1792455), (14, 1536390), (15, 1433964), (18, 1194970), (20, 1075473), (21, 1024260), (28, 768195), (30, 716982), (35, 614556), (36, 597485), (42, 512130), (43, 500220), (45, 477988), (60, 358491), (63, 341420), (70, 307278), (84, 256065), (86, 250110), (90, 238994), (105, 204852), (126, 170710), (129, 166740), (140, 153639), (172, 125055), (180, 119497), (210, 102426), (215, 100044), (252, 85355), (258, 83370), (301, 71460), (315, 68284), (387, 55580), (397, 54180), (420, 51213), (430, 50022), (516, 41685), (602, 35730), (630, 34142), (645, 33348), (774, 27790), (794, 27090), (860, 25011), (903, 23820), (1191, 18060), (1204, 17865), (1260, 17071), (1290, 16674), (1505, 14292), (1548, 13895), (1588, 13545), (1806, 11910), (1935, 11116), (1985, 10836), (2382, 9030), (2580, 8337), (2709, 7940), (2779, 7740), (3010, 7146), (3573, 6020), (3612, 5955), (3870, 5558), (3970, 5418), (4515, 4764)]