21387751

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{16339}}^1$

素因数の和:16374

約数の個数: 16

約数和(自身を含む): 28235520

約数和(自身を除く): 6847769

約数列:

[1, 7, 11, 17, 77, 119, 187, 1309, 16339, 114373, 179729, 277763, 1258103, 1944341, 3055393, 21387751]

約数ペア:

[(1, 21387751), (7, 3055393), (11, 1944341), (17, 1258103), (77, 277763), (119, 179729), (187, 114373), (1309, 16339)]