21684728

素因数分解:

$2^3\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{373}}^1$

素因数の和:448

約数の個数: 48

約数和(自身を含む): 45171720

約数和(自身を除く): 23486992

約数列:

[1, 2, 4, 8, 13, 26, 43, 52, 86, 104, 169, 172, 338, 344, 373, 559, 676, 746, 1118, 1352, 1492, 2236, 2984, 4472, 4849, 7267, 9698, 14534, 16039, 19396, 29068, 32078, 38792, 58136, 63037, 64156, 126074, 128312, 208507, 252148, 417014, 504296, 834028, 1668056, 2710591, 5421182, 10842364, 21684728]

約数ペア:

[(1, 21684728), (2, 10842364), (4, 5421182), (8, 2710591), (13, 1668056), (26, 834028), (43, 504296), (52, 417014), (86, 252148), (104, 208507), (169, 128312), (172, 126074), (338, 64156), (344, 63037), (373, 58136), (559, 38792), (676, 32078), (746, 29068), (1118, 19396), (1352, 16039), (1492, 14534), (2236, 9698), (2984, 7267), (4472, 4849)]