20864404

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{389}}^1$

素因数の和:480

約数の個数: 48

約数和(自身を含む): 42456960

約数和(自身を除く): 21592556

約数列:

[1, 2, 4, 11, 22, 23, 44, 46, 53, 92, 106, 212, 253, 389, 506, 583, 778, 1012, 1166, 1219, 1556, 2332, 2438, 4279, 4876, 8558, 8947, 13409, 17116, 17894, 20617, 26818, 35788, 41234, 53636, 82468, 98417, 196834, 226787, 393668, 453574, 474191, 907148, 948382, 1896764, 5216101, 10432202, 20864404]

約数ペア:

[(1, 20864404), (2, 10432202), (4, 5216101), (11, 1896764), (22, 948382), (23, 907148), (44, 474191), (46, 453574), (53, 393668), (92, 226787), (106, 196834), (212, 98417), (253, 82468), (389, 53636), (506, 41234), (583, 35788), (778, 26818), (1012, 20617), (1166, 17894), (1219, 17116), (1556, 13409), (2332, 8947), (2438, 8558), (4279, 4876)]