21534513

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{101}}^1$

素因数の和:206

約数の個数: 64

約数和(自身を含む): 39481344

約数和(自身を除く): 17946831

約数列:

[1, 3, 7, 11, 13, 21, 33, 39, 71, 77, 91, 101, 143, 213, 231, 273, 303, 429, 497, 707, 781, 923, 1001, 1111, 1313, 1491, 2121, 2343, 2769, 3003, 3333, 3939, 5467, 6461, 7171, 7777, 9191, 10153, 14443, 16401, 19383, 21513, 23331, 27573, 30459, 43329, 50197, 71071, 78881, 93223, 101101, 150591, 213213, 236643, 279669, 303303, 552167, 652561, 1025453, 1656501, 1957683, 3076359, 7178171, 21534513]

約数ペア:

[(1, 21534513), (3, 7178171), (7, 3076359), (11, 1957683), (13, 1656501), (21, 1025453), (33, 652561), (39, 552167), (71, 303303), (77, 279669), (91, 236643), (101, 213213), (143, 150591), (213, 101101), (231, 93223), (273, 78881), (303, 71071), (429, 50197), (497, 43329), (707, 30459), (781, 27573), (923, 23331), (1001, 21513), (1111, 19383), (1313, 16401), (1491, 14443), (2121, 10153), (2343, 9191), (2769, 7777), (3003, 7171), (3333, 6461), (3939, 5467)]