20742141

素因数分解:

$3^1\times 7^2\times {\mathrm{149}}^1\times {\mathrm{947}}^1$

素因数の和:1113

約数の個数: 24

約数和(自身を含む): 32421600

約数和(自身を除く): 11679459

約数列:

[1, 3, 7, 21, 49, 147, 149, 447, 947, 1043, 2841, 3129, 6629, 7301, 19887, 21903, 46403, 139209, 141103, 423309, 987721, 2963163, 6914047, 20742141]

約数ペア:

[(1, 20742141), (3, 6914047), (7, 2963163), (21, 987721), (49, 423309), (147, 141103), (149, 139209), (447, 46403), (947, 21903), (1043, 19887), (2841, 7301), (3129, 6629)]