20857389

素因数分解:

$3^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{199}}^1$

素因数の和:270

約数の個数: 48

約数和(自身を含む): 35020800

約数和(自身を除く): 14163411

約数列:

[1, 3, 7, 21, 23, 31, 49, 69, 93, 147, 161, 199, 217, 483, 597, 651, 713, 1127, 1393, 1519, 2139, 3381, 4179, 4557, 4577, 4991, 6169, 9751, 13731, 14973, 18507, 29253, 32039, 34937, 43183, 96117, 104811, 129549, 141887, 224273, 302281, 425661, 672819, 906843, 993209, 2979627, 6952463, 20857389]

約数ペア:

[(1, 20857389), (3, 6952463), (7, 2979627), (21, 993209), (23, 906843), (31, 672819), (49, 425661), (69, 302281), (93, 224273), (147, 141887), (161, 129549), (199, 104811), (217, 96117), (483, 43183), (597, 34937), (651, 32039), (713, 29253), (1127, 18507), (1393, 14973), (1519, 13731), (2139, 9751), (3381, 6169), (4179, 4991), (4557, 4577)]