19660784

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{661}}^1$

素因数の和:706

約数の個数: 60

約数和(自身を含む): 45066312

約数和(自身を除く): 25405528

約数列:

[1, 2, 4, 8, 11, 13, 16, 22, 26, 44, 52, 88, 104, 143, 169, 176, 208, 286, 338, 572, 661, 676, 1144, 1322, 1352, 1859, 2288, 2644, 2704, 3718, 5288, 7271, 7436, 8593, 10576, 14542, 14872, 17186, 29084, 29744, 34372, 58168, 68744, 94523, 111709, 116336, 137488, 189046, 223418, 378092, 446836, 756184, 893672, 1228799, 1512368, 1787344, 2457598, 4915196, 9830392, 19660784]

約数ペア:

[(1, 19660784), (2, 9830392), (4, 4915196), (8, 2457598), (11, 1787344), (13, 1512368), (16, 1228799), (22, 893672), (26, 756184), (44, 446836), (52, 378092), (88, 223418), (104, 189046), (143, 137488), (169, 116336), (176, 111709), (208, 94523), (286, 68744), (338, 58168), (572, 34372), (661, 29744), (676, 29084), (1144, 17186), (1322, 14872), (1352, 14542), (1859, 10576), (2288, 8593), (2644, 7436), (2704, 7271), (3718, 5288)]