20656515

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{599}}^1$

素因数の和:648

約数の個数: 48

約数和(自身を含む): 38304000

約数和(自身を除く): 17647485

約数列:

[1, 3, 5, 11, 15, 19, 33, 55, 57, 95, 121, 165, 209, 285, 363, 599, 605, 627, 1045, 1797, 1815, 2299, 2995, 3135, 6589, 6897, 8985, 11381, 11495, 19767, 32945, 34143, 34485, 56905, 72479, 98835, 125191, 170715, 217437, 362395, 375573, 625955, 1087185, 1377101, 1877865, 4131303, 6885505, 20656515]

約数ペア:

[(1, 20656515), (3, 6885505), (5, 4131303), (11, 1877865), (15, 1377101), (19, 1087185), (33, 625955), (55, 375573), (57, 362395), (95, 217437), (121, 170715), (165, 125191), (209, 98835), (285, 72479), (363, 56905), (599, 34485), (605, 34143), (627, 32945), (1045, 19767), (1797, 11495), (1815, 11381), (2299, 8985), (2995, 6897), (3135, 6589)]