21385441

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{157}}^1$

素因数の和:265

約数の個数: 32

約数和(自身を含む): 28212480

約数和(自身を除く): 6827039

約数列:

[1, 7, 11, 29, 61, 77, 157, 203, 319, 427, 671, 1099, 1727, 1769, 2233, 4553, 4697, 9577, 12089, 12383, 19459, 31871, 50083, 67039, 105347, 136213, 277733, 350581, 737429, 1944131, 3055063, 21385441]

約数ペア:

[(1, 21385441), (7, 3055063), (11, 1944131), (29, 737429), (61, 350581), (77, 277733), (157, 136213), (203, 105347), (319, 67039), (427, 50083), (671, 31871), (1099, 19459), (1727, 12383), (1769, 12089), (2233, 9577), (4553, 4697)]