21180249937

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{439}}^1\times {\mathrm{509}}^1\times {\mathrm{1231}}^1$

素因数の和:2197

約数の個数: 32

約数和(自身を含む): 26540236800

約数和(自身を除く): 5359986863

約数列:

[1, 7, 11, 77, 439, 509, 1231, 3073, 3563, 4829, 5599, 8617, 13541, 33803, 39193, 94787, 223451, 540409, 626579, 1564157, 2457961, 3782863, 4386053, 5944499, 6892369, 17205727, 41611493, 48246583, 275068181, 1925477267, 3025749991, 21180249937]

約数ペア:

[(1, 21180249937), (7, 3025749991), (11, 1925477267), (77, 275068181), (439, 48246583), (509, 41611493), (1231, 17205727), (3073, 6892369), (3563, 5944499), (4829, 4386053), (5599, 3782863), (8617, 2457961), (13541, 1564157), (33803, 626579), (39193, 540409), (94787, 223451)]