21498785

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{2939}}^1$

素因数の和:2981

約数の個数: 32

約数和(自身を含む): 33868800

約数和(自身を除く): 12370015

約数列:

[1, 5, 7, 11, 19, 35, 55, 77, 95, 133, 209, 385, 665, 1045, 1463, 2939, 7315, 14695, 20573, 32329, 55841, 102865, 161645, 226303, 279205, 390887, 614251, 1131515, 1954435, 3071255, 4299757, 21498785]

約数ペア:

[(1, 21498785), (5, 4299757), (7, 3071255), (11, 1954435), (19, 1131515), (35, 614251), (55, 390887), (77, 279205), (95, 226303), (133, 161645), (209, 102865), (385, 55841), (665, 32329), (1045, 20573), (1463, 14695), (2939, 7315)]