21644091

素因数分解:

$3^4\times 7^1\times {\mathrm{59}}^1\times {\mathrm{647}}^1$

素因数の和:725

約数の個数: 40

約数和(自身を含む): 37635840

約数和(自身を除く): 15991749

約数列:

[1, 3, 7, 9, 21, 27, 59, 63, 81, 177, 189, 413, 531, 567, 647, 1239, 1593, 1941, 3717, 4529, 4779, 5823, 11151, 13587, 17469, 33453, 38173, 40761, 52407, 114519, 122283, 267211, 343557, 366849, 801633, 1030671, 2404899, 3092013, 7214697, 21644091]

約数ペア:

[(1, 21644091), (3, 7214697), (7, 3092013), (9, 2404899), (21, 1030671), (27, 801633), (59, 366849), (63, 343557), (81, 267211), (177, 122283), (189, 114519), (413, 52407), (531, 40761), (567, 38173), (647, 33453), (1239, 17469), (1593, 13587), (1941, 11151), (3717, 5823), (4529, 4779)]