21487984

素因数分解:

$2^4\times 7^1\times {\mathrm{173}}^1\times {\mathrm{1109}}^1$

素因数の和:1297

約数の個数: 40

約数和(自身を含む): 47898720

約数和(自身を除く): 26410736

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 173, 346, 692, 1109, 1211, 1384, 2218, 2422, 2768, 4436, 4844, 7763, 8872, 9688, 15526, 17744, 19376, 31052, 62104, 124208, 191857, 383714, 767428, 1342999, 1534856, 2685998, 3069712, 5371996, 10743992, 21487984]

約数ペア:

[(1, 21487984), (2, 10743992), (4, 5371996), (7, 3069712), (8, 2685998), (14, 1534856), (16, 1342999), (28, 767428), (56, 383714), (112, 191857), (173, 124208), (346, 62104), (692, 31052), (1109, 19376), (1211, 17744), (1384, 15526), (2218, 9688), (2422, 8872), (2768, 7763), (4436, 4844)]