28813491

素因数分解:

$3^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{263}}^1$

素因数の和:360

約数の個数: 48

約数和(自身を含む): 50079744

約数和(自身を除く): 21266253

約数列:

[1, 3, 7, 9, 21, 37, 47, 63, 111, 141, 259, 263, 329, 333, 423, 777, 789, 987, 1739, 1841, 2331, 2367, 2961, 5217, 5523, 9731, 12173, 12361, 15651, 16569, 29193, 36519, 37083, 68117, 86527, 87579, 109557, 111249, 204351, 259581, 457357, 613053, 778743, 1372071, 3201499, 4116213, 9604497, 28813491]

約数ペア:

[(1, 28813491), (3, 9604497), (7, 4116213), (9, 3201499), (21, 1372071), (37, 778743), (47, 613053), (63, 457357), (111, 259581), (141, 204351), (259, 111249), (263, 109557), (329, 87579), (333, 86527), (423, 68117), (777, 37083), (789, 36519), (987, 29193), (1739, 16569), (1841, 15651), (2331, 12361), (2367, 12173), (2961, 9731), (5217, 5523)]