21149919

素因数分解:

$3^2\times 7^2\times {\mathrm{199}}^1\times {\mathrm{241}}^1$

素因数の和:460

約数の個数: 36

約数和(自身を含む): 35864400

約数和(自身を除く): 14714481

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 199, 241, 441, 597, 723, 1393, 1687, 1791, 2169, 4179, 5061, 9751, 11809, 12537, 15183, 29253, 35427, 47959, 87759, 106281, 143877, 335713, 431631, 1007139, 2349991, 3021417, 7049973, 21149919]

約数ペア:

[(1, 21149919), (3, 7049973), (7, 3021417), (9, 2349991), (21, 1007139), (49, 431631), (63, 335713), (147, 143877), (199, 106281), (241, 87759), (441, 47959), (597, 35427), (723, 29253), (1393, 15183), (1687, 12537), (1791, 11809), (2169, 9751), (4179, 5061)]