20457129

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{79}}^1$

素因数の和:178

約数の個数: 64

約数和(自身を含む): 36864000

約数和(自身を除く): 16406871

約数列:

[1, 3, 7, 11, 19, 21, 33, 57, 59, 77, 79, 133, 177, 209, 231, 237, 399, 413, 553, 627, 649, 869, 1121, 1239, 1463, 1501, 1659, 1947, 2607, 3363, 4389, 4503, 4543, 4661, 6083, 7847, 10507, 12331, 13629, 13983, 16511, 18249, 23541, 31521, 32627, 36993, 49533, 51271, 86317, 88559, 97881, 115577, 153813, 258951, 265677, 346731, 358897, 619913, 974149, 1076691, 1859739, 2922447, 6819043, 20457129]

約数ペア:

[(1, 20457129), (3, 6819043), (7, 2922447), (11, 1859739), (19, 1076691), (21, 974149), (33, 619913), (57, 358897), (59, 346731), (77, 265677), (79, 258951), (133, 153813), (177, 115577), (209, 97881), (231, 88559), (237, 86317), (399, 51271), (413, 49533), (553, 36993), (627, 32627), (649, 31521), (869, 23541), (1121, 18249), (1239, 16511), (1463, 13983), (1501, 13629), (1659, 12331), (1947, 10507), (2607, 7847), (3363, 6083), (4389, 4661), (4503, 4543)]