21660254

素因数分解:

$2^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{283}}^1$

素因数の和:381

約数の個数: 48

約数和(自身を含む): 41959296

約数和(自身を除く): 20299042

約数列:

[1, 2, 7, 11, 14, 22, 49, 71, 77, 98, 142, 154, 283, 497, 539, 566, 781, 994, 1078, 1562, 1981, 3113, 3479, 3962, 5467, 6226, 6958, 10934, 13867, 20093, 21791, 27734, 38269, 40186, 43582, 76538, 140651, 152537, 221023, 281302, 305074, 442046, 984557, 1547161, 1969114, 3094322, 10830127, 21660254]

約数ペア:

[(1, 21660254), (2, 10830127), (7, 3094322), (11, 1969114), (14, 1547161), (22, 984557), (49, 442046), (71, 305074), (77, 281302), (98, 221023), (142, 152537), (154, 140651), (283, 76538), (497, 43582), (539, 40186), (566, 38269), (781, 27734), (994, 21791), (1078, 20093), (1562, 13867), (1981, 10934), (3113, 6958), (3479, 6226), (3962, 5467)]