19784710

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{83}}^1\times {\mathrm{197}}^1$

素因数の和:309

約数の個数: 48

約数和(自身を含む): 39817008

約数和(自身を除く): 20032298

約数列:

[1, 2, 5, 10, 11, 22, 55, 83, 110, 121, 166, 197, 242, 394, 415, 605, 830, 913, 985, 1210, 1826, 1970, 2167, 4334, 4565, 9130, 10043, 10835, 16351, 20086, 21670, 23837, 32702, 47674, 50215, 81755, 100430, 119185, 163510, 179861, 238370, 359722, 899305, 1798610, 1978471, 3956942, 9892355, 19784710]

約数ペア:

[(1, 19784710), (2, 9892355), (5, 3956942), (10, 1978471), (11, 1798610), (22, 899305), (55, 359722), (83, 238370), (110, 179861), (121, 163510), (166, 119185), (197, 100430), (242, 81755), (394, 50215), (415, 47674), (605, 32702), (830, 23837), (913, 21670), (985, 20086), (1210, 16351), (1826, 10835), (1970, 10043), (2167, 9130), (4334, 4565)]