20288996

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{401}}^1$

素因数の和:564

約数の個数: 48

約数和(自身を含む): 44123520

約数和(自身を除く): 23834524

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 52, 91, 139, 182, 278, 364, 401, 556, 802, 973, 1604, 1807, 1946, 2807, 3614, 3892, 5213, 5614, 7228, 10426, 11228, 12649, 20852, 25298, 36491, 50596, 55739, 72982, 111478, 145964, 222956, 390173, 724607, 780346, 1449214, 1560692, 2898428, 5072249, 10144498, 20288996]

約数ペア:

[(1, 20288996), (2, 10144498), (4, 5072249), (7, 2898428), (13, 1560692), (14, 1449214), (26, 780346), (28, 724607), (52, 390173), (91, 222956), (139, 145964), (182, 111478), (278, 72982), (364, 55739), (401, 50596), (556, 36491), (802, 25298), (973, 20852), (1604, 12649), (1807, 11228), (1946, 10426), (2807, 7228), (3614, 5614), (3892, 5213)]