28181340

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{331}}^1$

素因数の和:400

約数の個数: 144

約数和(自身を含む): 95711616

約数和(自身を除く): 67530276

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 30, 33, 36, 43, 44, 45, 55, 60, 66, 86, 90, 99, 110, 129, 132, 165, 172, 180, 198, 215, 220, 258, 330, 331, 387, 396, 430, 473, 495, 516, 645, 660, 662, 774, 860, 946, 990, 993, 1290, 1324, 1419, 1548, 1655, 1892, 1935, 1980, 1986, 2365, 2580, 2838, 2979, 3310, 3641, 3870, 3972, 4257, 4730, 4965, 5676, 5958, 6620, 7095, 7282, 7740, 8514, 9460, 9930, 10923, 11916, 14190, 14233, 14564, 14895, 17028, 18205, 19860, 21285, 21846, 28380, 28466, 29790, 32769, 36410, 42570, 42699, 43692, 54615, 56932, 59580, 65538, 71165, 72820, 85140, 85398, 109230, 128097, 131076, 142330, 156563, 163845, 170796, 213495, 218460, 256194, 284660, 313126, 327690, 426990, 469689, 512388, 626252, 640485, 655380, 782815, 853980, 939378, 1280970, 1409067, 1565630, 1878756, 2348445, 2561940, 2818134, 3131260, 4696890, 5636268, 7045335, 9393780, 14090670, 28181340]

約数ペア:

[(1, 28181340), (2, 14090670), (3, 9393780), (4, 7045335), (5, 5636268), (6, 4696890), (9, 3131260), (10, 2818134), (11, 2561940), (12, 2348445), (15, 1878756), (18, 1565630), (20, 1409067), (22, 1280970), (30, 939378), (33, 853980), (36, 782815), (43, 655380), (44, 640485), (45, 626252), (55, 512388), (60, 469689), (66, 426990), (86, 327690), (90, 313126), (99, 284660), (110, 256194), (129, 218460), (132, 213495), (165, 170796), (172, 163845), (180, 156563), (198, 142330), (215, 131076), (220, 128097), (258, 109230), (330, 85398), (331, 85140), (387, 72820), (396, 71165), (430, 65538), (473, 59580), (495, 56932), (516, 54615), (645, 43692), (660, 42699), (662, 42570), (774, 36410), (860, 32769), (946, 29790), (990, 28466), (993, 28380), (1290, 21846), (1324, 21285), (1419, 19860), (1548, 18205), (1655, 17028), (1892, 14895), (1935, 14564), (1980, 14233), (1986, 14190), (2365, 11916), (2580, 10923), (2838, 9930), (2979, 9460), (3310, 8514), (3641, 7740), (3870, 7282), (3972, 7095), (4257, 6620), (4730, 5958), (4965, 5676)]