21377444

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{89}}^1\times {\mathrm{103}}^1$

素因数の和:260

約数の個数: 48

約数和(自身を含む): 42456960

約数和(自身を除く): 21079516

約数列:

[1, 2, 4, 11, 22, 44, 53, 89, 103, 106, 178, 206, 212, 356, 412, 583, 979, 1133, 1166, 1958, 2266, 2332, 3916, 4532, 4717, 5459, 9167, 9434, 10918, 18334, 18868, 21836, 36668, 51887, 60049, 100837, 103774, 120098, 201674, 207548, 240196, 403348, 485851, 971702, 1943404, 5344361, 10688722, 21377444]

約数ペア:

[(1, 21377444), (2, 10688722), (4, 5344361), (11, 1943404), (22, 971702), (44, 485851), (53, 403348), (89, 240196), (103, 207548), (106, 201674), (178, 120098), (206, 103774), (212, 100837), (356, 60049), (412, 51887), (583, 36668), (979, 21836), (1133, 18868), (1166, 18334), (1958, 10918), (2266, 9434), (2332, 9167), (3916, 5459), (4532, 4717)]