21447760

素因数分解:

$2^4\times 5^1\times {\mathrm{127}}^1\times {\mathrm{2111}}^1$

素因数の和:2251

約数の個数: 40

約数和(自身を含む): 50282496

約数和(自身を除く): 28834736

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 127, 254, 508, 635, 1016, 1270, 2032, 2111, 2540, 4222, 5080, 8444, 10160, 10555, 16888, 21110, 33776, 42220, 84440, 168880, 268097, 536194, 1072388, 1340485, 2144776, 2680970, 4289552, 5361940, 10723880, 21447760]

約数ペア:

[(1, 21447760), (2, 10723880), (4, 5361940), (5, 4289552), (8, 2680970), (10, 2144776), (16, 1340485), (20, 1072388), (40, 536194), (80, 268097), (127, 168880), (254, 84440), (508, 42220), (635, 33776), (1016, 21110), (1270, 16888), (2032, 10555), (2111, 10160), (2540, 8444), (4222, 5080)]