21107680

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{179}}^1$

素因数の和:272

約数の個数: 96

約数和(自身を含む): 55520640

約数和(自身を除く): 34412960

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 67, 80, 88, 110, 134, 160, 176, 179, 220, 268, 335, 352, 358, 440, 536, 670, 716, 737, 880, 895, 1072, 1340, 1432, 1474, 1760, 1790, 1969, 2144, 2680, 2864, 2948, 3580, 3685, 3938, 5360, 5728, 5896, 7160, 7370, 7876, 9845, 10720, 11792, 11993, 14320, 14740, 15752, 19690, 23584, 23986, 28640, 29480, 31504, 39380, 47972, 58960, 59965, 63008, 78760, 95944, 117920, 119930, 131923, 157520, 191888, 239860, 263846, 315040, 383776, 479720, 527692, 659615, 959440, 1055384, 1319230, 1918880, 2110768, 2638460, 4221536, 5276920, 10553840, 21107680]

約数ペア:

[(1, 21107680), (2, 10553840), (4, 5276920), (5, 4221536), (8, 2638460), (10, 2110768), (11, 1918880), (16, 1319230), (20, 1055384), (22, 959440), (32, 659615), (40, 527692), (44, 479720), (55, 383776), (67, 315040), (80, 263846), (88, 239860), (110, 191888), (134, 157520), (160, 131923), (176, 119930), (179, 117920), (220, 95944), (268, 78760), (335, 63008), (352, 59965), (358, 58960), (440, 47972), (536, 39380), (670, 31504), (716, 29480), (737, 28640), (880, 23986), (895, 23584), (1072, 19690), (1340, 15752), (1432, 14740), (1474, 14320), (1760, 11993), (1790, 11792), (1969, 10720), (2144, 9845), (2680, 7876), (2864, 7370), (2948, 7160), (3580, 5896), (3685, 5728), (3938, 5360)]