21781154307

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{1688069}}^1$

素因数の和:1688123

約数の個数: 32

約数和(自身を含む): 35003819520

約数和(自身を除く): 13222665213

約数列:

[1, 3, 11, 17, 23, 33, 51, 69, 187, 253, 391, 561, 759, 1173, 4301, 12903, 1688069, 5064207, 18568759, 28697173, 38825587, 55706277, 86091519, 116476761, 315668903, 427081457, 660034979, 947006709, 1281244371, 1980104937, 7260384769, 21781154307]

約数ペア:

[(1, 21781154307), (3, 7260384769), (11, 1980104937), (17, 1281244371), (23, 947006709), (33, 660034979), (51, 427081457), (69, 315668903), (187, 116476761), (253, 86091519), (391, 55706277), (561, 38825587), (759, 28697173), (1173, 18568759), (4301, 5064207), (12903, 1688069)]