21553840

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{3499}}^1$

素因数の和:3530

約数の個数: 80

約数和(自身を含む): 62496000

約数和(自身を除く): 40942160

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 16, 20, 22, 28, 35, 40, 44, 55, 56, 70, 77, 80, 88, 110, 112, 140, 154, 176, 220, 280, 308, 385, 440, 560, 616, 770, 880, 1232, 1540, 3080, 3499, 6160, 6998, 13996, 17495, 24493, 27992, 34990, 38489, 48986, 55984, 69980, 76978, 97972, 122465, 139960, 153956, 192445, 195944, 244930, 269423, 279920, 307912, 384890, 391888, 489860, 538846, 615824, 769780, 979720, 1077692, 1347115, 1539560, 1959440, 2155384, 2694230, 3079120, 4310768, 5388460, 10776920, 21553840]

約数ペア:

[(1, 21553840), (2, 10776920), (4, 5388460), (5, 4310768), (7, 3079120), (8, 2694230), (10, 2155384), (11, 1959440), (14, 1539560), (16, 1347115), (20, 1077692), (22, 979720), (28, 769780), (35, 615824), (40, 538846), (44, 489860), (55, 391888), (56, 384890), (70, 307912), (77, 279920), (80, 269423), (88, 244930), (110, 195944), (112, 192445), (140, 153956), (154, 139960), (176, 122465), (220, 97972), (280, 76978), (308, 69980), (385, 55984), (440, 48986), (560, 38489), (616, 34990), (770, 27992), (880, 24493), (1232, 17495), (1540, 13996), (3080, 6998), (3499, 6160)]