20904237

素因数分解:

$3^4\times {\mathrm{17}}^2\times {\mathrm{19}}^1\times {\mathrm{47}}^1$

素因数の和:112

約数の個数: 60

約数和(自身を含む): 35661120

約数和(自身を除く): 14756883

約数列:

[1, 3, 9, 17, 19, 27, 47, 51, 57, 81, 141, 153, 171, 289, 323, 423, 459, 513, 799, 867, 893, 969, 1269, 1377, 1539, 2397, 2601, 2679, 2907, 3807, 5491, 7191, 7803, 8037, 8721, 13583, 15181, 16473, 21573, 23409, 24111, 26163, 40749, 45543, 49419, 64719, 72333, 122247, 136629, 148257, 258077, 366741, 409887, 444771, 774231, 1100223, 1229661, 2322693, 6968079, 20904237]

約数ペア:

[(1, 20904237), (3, 6968079), (9, 2322693), (17, 1229661), (19, 1100223), (27, 774231), (47, 444771), (51, 409887), (57, 366741), (81, 258077), (141, 148257), (153, 136629), (171, 122247), (289, 72333), (323, 64719), (423, 49419), (459, 45543), (513, 40749), (799, 26163), (867, 24111), (893, 23409), (969, 21573), (1269, 16473), (1377, 15181), (1539, 13583), (2397, 8721), (2601, 8037), (2679, 7803), (2907, 7191), (3807, 5491)]