21676408

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{257}}^1\times {\mathrm{811}}^1$

素因数の和:1087

約数の個数: 32

約数和(自身を含む): 43994160

約数和(自身を除く): 22317752

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 257, 514, 811, 1028, 1622, 2056, 3244, 3341, 6488, 6682, 10543, 13364, 21086, 26728, 42172, 84344, 208427, 416854, 833708, 1667416, 2709551, 5419102, 10838204, 21676408]

約数ペア:

[(1, 21676408), (2, 10838204), (4, 5419102), (8, 2709551), (13, 1667416), (26, 833708), (52, 416854), (104, 208427), (257, 84344), (514, 42172), (811, 26728), (1028, 21086), (1622, 13364), (2056, 10543), (3244, 6682), (3341, 6488)]