21787311

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^2\times {\mathrm{877}}^1$

素因数の和:920

約数の個数: 36

約数和(自身を含む): 36633672

約数和(自身を除く): 14846361

約数列:

[1, 3, 7, 13, 21, 39, 49, 91, 147, 169, 273, 507, 637, 877, 1183, 1911, 2631, 3549, 6139, 8281, 11401, 18417, 24843, 34203, 42973, 79807, 128919, 148213, 239421, 444639, 558649, 1037491, 1675947, 3112473, 7262437, 21787311]

約数ペア:

[(1, 21787311), (3, 7262437), (7, 3112473), (13, 1675947), (21, 1037491), (39, 558649), (49, 444639), (91, 239421), (147, 148213), (169, 128919), (273, 79807), (507, 42973), (637, 34203), (877, 24843), (1183, 18417), (1911, 11401), (2631, 8281), (3549, 6139)]