81718868

素因数分解:

$2^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{1307}}^1$

素因数の和:1365

約数の個数: 72

約数和(自身を含む): 187881120

約数和(自身を除く): 106162252

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 29, 44, 49, 58, 77, 98, 116, 154, 196, 203, 308, 319, 406, 539, 638, 812, 1078, 1276, 1307, 1421, 2156, 2233, 2614, 2842, 4466, 5228, 5684, 8932, 9149, 14377, 15631, 18298, 28754, 31262, 36596, 37903, 57508, 62524, 64043, 75806, 100639, 128086, 151612, 201278, 256172, 265321, 402556, 416933, 530642, 704473, 833866, 1061284, 1408946, 1667732, 1857247, 2817892, 2918531, 3714494, 5837062, 7428988, 11674124, 20429717, 40859434, 81718868]

約数ペア:

[(1, 81718868), (2, 40859434), (4, 20429717), (7, 11674124), (11, 7428988), (14, 5837062), (22, 3714494), (28, 2918531), (29, 2817892), (44, 1857247), (49, 1667732), (58, 1408946), (77, 1061284), (98, 833866), (116, 704473), (154, 530642), (196, 416933), (203, 402556), (308, 265321), (319, 256172), (406, 201278), (539, 151612), (638, 128086), (812, 100639), (1078, 75806), (1276, 64043), (1307, 62524), (1421, 57508), (2156, 37903), (2233, 36596), (2614, 31262), (2842, 28754), (4466, 18298), (5228, 15631), (5684, 14377), (8932, 9149)]