20651.0000000

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^2\times {\mathrm{79}}^1$

素因数の和:122

約数の個数: 36

約数和(自身を含む): 3337920

約数和(自身を除く): 1375323

約数列:

[1, 3, 7, 13, 21, 39, 49, 79, 91, 147, 169, 237, 273, 507, 553, 637, 1027, 1183, 1659, 1911, 3081, 3549, 3871, 7189, 8281, 11613, 13351, 21567, 24843, 40053, 50323, 93457, 150969, 280371, 654199, 1962597]

約数ペア:

[(1, 1962597), (3, 654199), (7, 280371), (13, 150969), (21, 93457), (39, 50323), (49, 40053), (79, 24843), (91, 21567), (147, 13351), (169, 11613), (237, 8281), (273, 7189), (507, 3871), (553, 3549), (637, 3081), (1027, 1911), (1183, 1659)]