20032760

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{4139}}^1$

素因数の和:4172

約数の個数: 48

約数和(自身を含む): 49555800

約数和(自身を除く): 29523040

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 121, 220, 242, 440, 484, 605, 968, 1210, 2420, 4139, 4840, 8278, 16556, 20695, 33112, 41390, 45529, 82780, 91058, 165560, 182116, 227645, 364232, 455290, 500819, 910580, 1001638, 1821160, 2003276, 2504095, 4006552, 5008190, 10016380, 20032760]

約数ペア:

[(1, 20032760), (2, 10016380), (4, 5008190), (5, 4006552), (8, 2504095), (10, 2003276), (11, 1821160), (20, 1001638), (22, 910580), (40, 500819), (44, 455290), (55, 364232), (88, 227645), (110, 182116), (121, 165560), (220, 91058), (242, 82780), (440, 45529), (484, 41390), (605, 33112), (968, 20695), (1210, 16556), (2420, 8278), (4139, 4840)]