21870541

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{439}}^1\times {\mathrm{647}}^1$

素因数の和:1104

約数の個数: 16

約数和(自身を含む): 27371520

約数和(自身を除く): 5500979

約数列:

[1, 7, 11, 77, 439, 647, 3073, 4529, 4829, 7117, 33803, 49819, 284033, 1988231, 3124363, 21870541]

約数ペア:

[(1, 21870541), (7, 3124363), (11, 1988231), (77, 284033), (439, 49819), (647, 33803), (3073, 7117), (4529, 4829)]