21881288

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{617}}^1$

素因数の和:678

約数の個数: 64

約数和(自身を含む): 49835520

約数和(自身を除く): 27954232

約数列:

[1, 2, 4, 8, 11, 13, 22, 26, 31, 44, 52, 62, 88, 104, 124, 143, 248, 286, 341, 403, 572, 617, 682, 806, 1144, 1234, 1364, 1612, 2468, 2728, 3224, 4433, 4936, 6787, 8021, 8866, 13574, 16042, 17732, 19127, 27148, 32084, 35464, 38254, 54296, 64168, 76508, 88231, 153016, 176462, 210397, 248651, 352924, 420794, 497302, 705848, 841588, 994604, 1683176, 1989208, 2735161, 5470322, 10940644, 21881288]

約数ペア:

[(1, 21881288), (2, 10940644), (4, 5470322), (8, 2735161), (11, 1989208), (13, 1683176), (22, 994604), (26, 841588), (31, 705848), (44, 497302), (52, 420794), (62, 352924), (88, 248651), (104, 210397), (124, 176462), (143, 153016), (248, 88231), (286, 76508), (341, 64168), (403, 54296), (572, 38254), (617, 35464), (682, 32084), (806, 27148), (1144, 19127), (1234, 17732), (1364, 16042), (1612, 13574), (2468, 8866), (2728, 8021), (3224, 6787), (4433, 4936)]