20811357

素因数分解:

$3^3\times 7^1\times {\mathrm{29}}^1\times {\mathrm{3797}}^1$

素因数の和:3842

約数の個数: 32

約数和(自身を含む): 36460800

約数和(自身を除く): 15649443

約数列:

[1, 3, 7, 9, 21, 27, 29, 63, 87, 189, 203, 261, 609, 783, 1827, 3797, 5481, 11391, 26579, 34173, 79737, 102519, 110113, 239211, 330339, 717633, 770791, 991017, 2312373, 2973051, 6937119, 20811357]

約数ペア:

[(1, 20811357), (3, 6937119), (7, 2973051), (9, 2312373), (21, 991017), (27, 770791), (29, 717633), (63, 330339), (87, 239211), (189, 110113), (203, 102519), (261, 79737), (609, 34173), (783, 26579), (1827, 11391), (3797, 5481)]