21396155

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{83}}^1\times {\mathrm{109}}^1$

素因数の和:251

約数の個数: 32

約数和(自身を含む): 29272320

約数和(自身を除く): 7876165

約数列:

[1, 5, 11, 43, 55, 83, 109, 215, 415, 473, 545, 913, 1199, 2365, 3569, 4565, 4687, 5995, 9047, 17845, 23435, 39259, 45235, 51557, 99517, 196295, 257785, 389021, 497585, 1945105, 4279231, 21396155]

約数ペア:

[(1, 21396155), (5, 4279231), (11, 1945105), (43, 497585), (55, 389021), (83, 257785), (109, 196295), (215, 99517), (415, 51557), (473, 45235), (545, 39259), (913, 23435), (1199, 17845), (2365, 9047), (3569, 5995), (4565, 4687)]