21501963

素因数分解:

$3^3\times 7^1\times {\mathrm{29}}^1\times {\mathrm{3923}}^1$

素因数の和:3968

約数の個数: 32

約数和(自身を含む): 37670400

約数和(自身を除く): 16168437

約数列:

[1, 3, 7, 9, 21, 27, 29, 63, 87, 189, 203, 261, 609, 783, 1827, 3923, 5481, 11769, 27461, 35307, 82383, 105921, 113767, 247149, 341301, 741447, 796369, 1023903, 2389107, 3071709, 7167321, 21501963]

約数ペア:

[(1, 21501963), (3, 7167321), (7, 3071709), (9, 2389107), (21, 1023903), (27, 796369), (29, 741447), (63, 341301), (87, 247149), (189, 113767), (203, 105921), (261, 82383), (609, 35307), (783, 27461), (1827, 11769), (3923, 5481)]