21372967

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{2087}}^1$

素因数の和:2131

約数の個数: 24

約数和(自身を含む): 28563840

約数和(自身を除く): 7190873

約数列:

[1, 7, 11, 19, 49, 77, 133, 209, 539, 931, 1463, 2087, 10241, 14609, 22957, 39653, 102263, 160699, 277571, 436183, 1124893, 1942997, 3053281, 21372967]

約数ペア:

[(1, 21372967), (7, 3053281), (11, 1942997), (19, 1124893), (49, 436183), (77, 277571), (133, 160699), (209, 102263), (539, 39653), (931, 22957), (1463, 14609), (2087, 10241)]