21209818

素因数分解:

$2^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{199}}^1\times {\mathrm{331}}^1$

素因数の和:562

約数の個数: 32

約数和(自身を含む): 38246400

約数和(自身を除く): 17036582

約数列:

[1, 2, 7, 14, 23, 46, 161, 199, 322, 331, 398, 662, 1393, 2317, 2786, 4577, 4634, 7613, 9154, 15226, 32039, 53291, 64078, 65869, 106582, 131738, 461083, 922166, 1514987, 3029974, 10604909, 21209818]

約数ペア:

[(1, 21209818), (2, 10604909), (7, 3029974), (14, 1514987), (23, 922166), (46, 461083), (161, 131738), (199, 106582), (322, 65869), (331, 64078), (398, 53291), (662, 32039), (1393, 15226), (2317, 9154), (2786, 7613), (4577, 4634)]