21279544

素因数分解:

$2^3\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1$

素因数の和:149

約数の個数: 96

約数和(自身を含む): 50274000

約数和(自身を除く): 28994456

約数列:

[1, 2, 4, 8, 11, 13, 19, 22, 26, 38, 44, 52, 76, 88, 89, 104, 121, 143, 152, 178, 209, 242, 247, 286, 356, 418, 484, 494, 572, 712, 836, 968, 979, 988, 1144, 1157, 1573, 1672, 1691, 1958, 1976, 2299, 2314, 2717, 3146, 3382, 3916, 4598, 4628, 5434, 6292, 6764, 7832, 9196, 9256, 10769, 10868, 12584, 12727, 13528, 18392, 18601, 21538, 21736, 21983, 25454, 29887, 37202, 43076, 43966, 50908, 59774, 74404, 86152, 87932, 101816, 119548, 139997, 148808, 175864, 204611, 239096, 241813, 279994, 409222, 483626, 559988, 818444, 967252, 1119976, 1636888, 1934504, 2659943, 5319886, 10639772, 21279544]

約数ペア:

[(1, 21279544), (2, 10639772), (4, 5319886), (8, 2659943), (11, 1934504), (13, 1636888), (19, 1119976), (22, 967252), (26, 818444), (38, 559988), (44, 483626), (52, 409222), (76, 279994), (88, 241813), (89, 239096), (104, 204611), (121, 175864), (143, 148808), (152, 139997), (178, 119548), (209, 101816), (242, 87932), (247, 86152), (286, 74404), (356, 59774), (418, 50908), (484, 43966), (494, 43076), (572, 37202), (712, 29887), (836, 25454), (968, 21983), (979, 21736), (988, 21538), (1144, 18601), (1157, 18392), (1573, 13528), (1672, 12727), (1691, 12584), (1958, 10868), (1976, 10769), (2299, 9256), (2314, 9196), (2717, 7832), (3146, 6764), (3382, 6292), (3916, 5434), (4598, 4628)]