21053565

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{73}}^1$

素因数の和:143

約数の個数: 96

約数和(自身を含む): 43636320

約数和(自身を除く): 22582755

約数列:

[1, 3, 5, 9, 13, 15, 17, 29, 39, 45, 51, 65, 73, 85, 87, 117, 145, 153, 195, 219, 221, 255, 261, 365, 377, 435, 493, 585, 657, 663, 765, 949, 1095, 1105, 1131, 1241, 1305, 1479, 1885, 1989, 2117, 2465, 2847, 3285, 3315, 3393, 3723, 4437, 4745, 5655, 6205, 6351, 6409, 7395, 8541, 9945, 10585, 11169, 14235, 16133, 16965, 18615, 19053, 19227, 22185, 27521, 31755, 32045, 35989, 42705, 48399, 55845, 57681, 80665, 82563, 95265, 96135, 107967, 137605, 145197, 179945, 241995, 247689, 288405, 323901, 412815, 467857, 539835, 725985, 1238445, 1403571, 1619505, 2339285, 4210713, 7017855, 21053565]

約数ペア:

[(1, 21053565), (3, 7017855), (5, 4210713), (9, 2339285), (13, 1619505), (15, 1403571), (17, 1238445), (29, 725985), (39, 539835), (45, 467857), (51, 412815), (65, 323901), (73, 288405), (85, 247689), (87, 241995), (117, 179945), (145, 145197), (153, 137605), (195, 107967), (219, 96135), (221, 95265), (255, 82563), (261, 80665), (365, 57681), (377, 55845), (435, 48399), (493, 42705), (585, 35989), (657, 32045), (663, 31755), (765, 27521), (949, 22185), (1095, 19227), (1105, 19053), (1131, 18615), (1241, 16965), (1305, 16133), (1479, 14235), (1885, 11169), (1989, 10585), (2117, 9945), (2465, 8541), (2847, 7395), (3285, 6409), (3315, 6351), (3393, 6205), (3723, 5655), (4437, 4745)]