21385276

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{127}}^1$

素因数の和:274

約数の個数: 48

約数和(自身を含む): 42577920

約数和(自身を除く): 21192644

約数列:

[1, 2, 4, 11, 22, 43, 44, 86, 89, 127, 172, 178, 254, 356, 473, 508, 946, 979, 1397, 1892, 1958, 2794, 3827, 3916, 5461, 5588, 7654, 10922, 11303, 15308, 21844, 22606, 42097, 45212, 60071, 84194, 120142, 124333, 168388, 240284, 248666, 486029, 497332, 972058, 1944116, 5346319, 10692638, 21385276]

約数ペア:

[(1, 21385276), (2, 10692638), (4, 5346319), (11, 1944116), (22, 972058), (43, 497332), (44, 486029), (86, 248666), (89, 240284), (127, 168388), (172, 124333), (178, 120142), (254, 84194), (356, 60071), (473, 45212), (508, 42097), (946, 22606), (979, 21844), (1397, 15308), (1892, 11303), (1958, 10922), (2794, 7654), (3827, 5588), (3916, 5461)]