20878473

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1$

素因数の和:178

約数の個数: 64

約数和(自身を含む): 37601280

約数和(自身を除く): 16722807

約数列:

[1, 3, 7, 11, 19, 21, 33, 57, 67, 71, 77, 133, 201, 209, 213, 231, 399, 469, 497, 627, 737, 781, 1273, 1349, 1407, 1463, 1491, 2211, 2343, 3819, 4047, 4389, 4757, 5159, 5467, 8911, 9443, 14003, 14271, 14839, 15477, 16401, 26733, 28329, 33299, 42009, 44517, 52327, 90383, 98021, 99897, 103873, 156981, 271149, 294063, 311619, 366289, 632681, 994213, 1098867, 1898043, 2982639, 6959491, 20878473]

約数ペア:

[(1, 20878473), (3, 6959491), (7, 2982639), (11, 1898043), (19, 1098867), (21, 994213), (33, 632681), (57, 366289), (67, 311619), (71, 294063), (77, 271149), (133, 156981), (201, 103873), (209, 99897), (213, 98021), (231, 90383), (399, 52327), (469, 44517), (497, 42009), (627, 33299), (737, 28329), (781, 26733), (1273, 16401), (1349, 15477), (1407, 14839), (1463, 14271), (1491, 14003), (2211, 9443), (2343, 8911), (3819, 5467), (4047, 5159), (4389, 4757)]