21399548

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{31}}^2\times {\mathrm{293}}^1$

素因数の和:378

約数の個数: 36

約数和(自身を含む): 40871880

約数和(自身を除く): 19472332

約数列:

[1, 2, 4, 19, 31, 38, 62, 76, 124, 293, 586, 589, 961, 1172, 1178, 1922, 2356, 3844, 5567, 9083, 11134, 18166, 18259, 22268, 36332, 36518, 73036, 172577, 281573, 345154, 563146, 690308, 1126292, 5349887, 10699774, 21399548]

約数ペア:

[(1, 21399548), (2, 10699774), (4, 5349887), (19, 1126292), (31, 690308), (38, 563146), (62, 345154), (76, 281573), (124, 172577), (293, 73036), (586, 36518), (589, 36332), (961, 22268), (1172, 18259), (1178, 18166), (1922, 11134), (2356, 9083), (3844, 5567)]