21211619

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{211}}^1$

素因数の和:291

約数の個数: 32

約数和(自身を含む): 27068160

約数和(自身を除く): 5856541

約数列:

[1, 11, 13, 19, 37, 143, 209, 211, 247, 407, 481, 703, 2321, 2717, 2743, 4009, 5291, 7733, 7807, 9139, 30173, 44099, 52117, 85877, 100529, 101491, 148333, 573287, 1116401, 1631663, 1928329, 21211619]

約数ペア:

[(1, 21211619), (11, 1928329), (13, 1631663), (19, 1116401), (37, 573287), (143, 148333), (209, 101491), (211, 100529), (247, 85877), (407, 52117), (481, 44099), (703, 30173), (2321, 9139), (2717, 7807), (2743, 7733), (4009, 5291)]