21301805

素因数分解:

$5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{677}}^1$

素因数の和:749

約数の個数: 32

約数和(自身を含む): 31242240

約数和(自身を除く): 9940435

約数列:

[1, 5, 7, 29, 31, 35, 145, 155, 203, 217, 677, 899, 1015, 1085, 3385, 4495, 4739, 6293, 19633, 20987, 23695, 31465, 98165, 104935, 137431, 146909, 608623, 687155, 734545, 3043115, 4260361, 21301805]

約数ペア:

[(1, 21301805), (5, 4260361), (7, 3043115), (29, 734545), (31, 687155), (35, 608623), (145, 146909), (155, 137431), (203, 104935), (217, 98165), (677, 31465), (899, 23695), (1015, 20987), (1085, 19633), (3385, 6293), (4495, 4739)]