21105920

素因数分解:

$2^8\times 5^1\times {\mathrm{11}}^1\times {\mathrm{1499}}^1$

素因数の和:1531

約数の個数: 72

約数和(自身を含む): 55188000

約数和(自身を除く): 34082080

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 64, 80, 88, 110, 128, 160, 176, 220, 256, 320, 352, 440, 640, 704, 880, 1280, 1408, 1499, 1760, 2816, 2998, 3520, 5996, 7040, 7495, 11992, 14080, 14990, 16489, 23984, 29980, 32978, 47968, 59960, 65956, 82445, 95936, 119920, 131912, 164890, 191872, 239840, 263824, 329780, 383744, 479680, 527648, 659560, 959360, 1055296, 1319120, 1918720, 2110592, 2638240, 4221184, 5276480, 10552960, 21105920]

約数ペア:

[(1, 21105920), (2, 10552960), (4, 5276480), (5, 4221184), (8, 2638240), (10, 2110592), (11, 1918720), (16, 1319120), (20, 1055296), (22, 959360), (32, 659560), (40, 527648), (44, 479680), (55, 383744), (64, 329780), (80, 263824), (88, 239840), (110, 191872), (128, 164890), (160, 131912), (176, 119920), (220, 95936), (256, 82445), (320, 65956), (352, 59960), (440, 47968), (640, 32978), (704, 29980), (880, 23984), (1280, 16489), (1408, 14990), (1499, 14080), (1760, 11992), (2816, 7495), (2998, 7040), (3520, 5996)]