21865383

素因数分解:

$3^5\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{79}}^1$

素因数の和:178

約数の個数: 48

約数和(自身を含む): 35642880

約数和(自身を除く): 13777497

約数列:

[1, 3, 9, 17, 27, 51, 67, 79, 81, 153, 201, 237, 243, 459, 603, 711, 1139, 1343, 1377, 1809, 2133, 3417, 4029, 4131, 5293, 5427, 6399, 10251, 12087, 15879, 16281, 19197, 30753, 36261, 47637, 89981, 92259, 108783, 142911, 269943, 276777, 326349, 428733, 809829, 1286199, 2429487, 7288461, 21865383]

約数ペア:

[(1, 21865383), (3, 7288461), (9, 2429487), (17, 1286199), (27, 809829), (51, 428733), (67, 326349), (79, 276777), (81, 269943), (153, 142911), (201, 108783), (237, 92259), (243, 89981), (459, 47637), (603, 36261), (711, 30753), (1139, 19197), (1343, 16281), (1377, 15879), (1809, 12087), (2133, 10251), (3417, 6399), (4029, 5427), (4131, 5293)]