21138984

素因数分解:

$2^3\times 3^2\times {\mathrm{331}}^1\times {\mathrm{887}}^1$

素因数の和:1230

約数の個数: 48

約数和(自身を含む): 57489120

約数和(自身を除く): 36350136

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72, 331, 662, 887, 993, 1324, 1774, 1986, 2648, 2661, 2979, 3548, 3972, 5322, 5958, 7096, 7944, 7983, 10644, 11916, 15966, 21288, 23832, 31932, 63864, 293597, 587194, 880791, 1174388, 1761582, 2348776, 2642373, 3523164, 5284746, 7046328, 10569492, 21138984]

約数ペア:

[(1, 21138984), (2, 10569492), (3, 7046328), (4, 5284746), (6, 3523164), (8, 2642373), (9, 2348776), (12, 1761582), (18, 1174388), (24, 880791), (36, 587194), (72, 293597), (331, 63864), (662, 31932), (887, 23832), (993, 21288), (1324, 15966), (1774, 11916), (1986, 10644), (2648, 7983), (2661, 7944), (2979, 7096), (3548, 5958), (3972, 5322)]