21557276

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{311}}^1$

素因数の和:402

約数の個数: 48

約数和(自身を含む): 43051008

約数和(自身を除く): 21493732

約数列:

[1, 2, 4, 13, 26, 31, 43, 52, 62, 86, 124, 172, 311, 403, 559, 622, 806, 1118, 1244, 1333, 1612, 2236, 2666, 4043, 5332, 8086, 9641, 13373, 16172, 17329, 19282, 26746, 34658, 38564, 53492, 69316, 125333, 173849, 250666, 347698, 414563, 501332, 695396, 829126, 1658252, 5389319, 10778638, 21557276]

約数ペア:

[(1, 21557276), (2, 10778638), (4, 5389319), (13, 1658252), (26, 829126), (31, 695396), (43, 501332), (52, 414563), (62, 347698), (86, 250666), (124, 173849), (172, 125333), (311, 69316), (403, 53492), (559, 38564), (622, 34658), (806, 26746), (1118, 19282), (1244, 17329), (1333, 16172), (1612, 13373), (2236, 9641), (2666, 8086), (4043, 5332)]