257916393

素因数分解:

$3^4\times 7^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{269}}^1$

素因数の和:396

約数の個数: 80

約数和(自身を含む): 470448000

約数和(自身を除く): 212531607

約数列:

[1, 3, 7, 9, 19, 21, 27, 57, 63, 81, 89, 133, 171, 189, 267, 269, 399, 513, 567, 623, 801, 807, 1197, 1539, 1691, 1869, 1883, 2403, 2421, 3591, 5073, 5111, 5607, 5649, 7209, 7263, 10773, 11837, 15219, 15333, 16821, 16947, 21789, 23941, 35511, 35777, 45657, 45999, 50463, 50841, 71823, 106533, 107331, 136971, 137997, 152523, 167587, 215469, 319599, 321993, 413991, 454879, 502761, 646407, 958797, 965979, 1364637, 1508283, 1939221, 2897937, 3184153, 4093911, 4524849, 9552459, 12281733, 13574547, 28657377, 36845199, 85972131, 257916393]

約数ペア:

[(1, 257916393), (3, 85972131), (7, 36845199), (9, 28657377), (19, 13574547), (21, 12281733), (27, 9552459), (57, 4524849), (63, 4093911), (81, 3184153), (89, 2897937), (133, 1939221), (171, 1508283), (189, 1364637), (267, 965979), (269, 958797), (399, 646407), (513, 502761), (567, 454879), (623, 413991), (801, 321993), (807, 319599), (1197, 215469), (1539, 167587), (1691, 152523), (1869, 137997), (1883, 136971), (2403, 107331), (2421, 106533), (3591, 71823), (5073, 50841), (5111, 50463), (5607, 45999), (5649, 45657), (7209, 35777), (7263, 35511), (10773, 23941), (11837, 21789), (15219, 16947), (15333, 16821)]