20884851

素因数分解:

$3^3\times {\mathrm{13}}^2\times {\mathrm{23}}^1\times {\mathrm{199}}^1$

素因数の和:257

約数の個数: 48

約数和(自身を含む): 35136000

約数和(自身を除く): 14251149

約数列:

[1, 3, 9, 13, 23, 27, 39, 69, 117, 169, 199, 207, 299, 351, 507, 597, 621, 897, 1521, 1791, 2587, 2691, 3887, 4563, 4577, 5373, 7761, 8073, 11661, 13731, 23283, 33631, 34983, 41193, 59501, 69849, 100893, 104949, 123579, 178503, 302679, 535509, 773513, 908037, 1606527, 2320539, 6961617, 20884851]

約数ペア:

[(1, 20884851), (3, 6961617), (9, 2320539), (13, 1606527), (23, 908037), (27, 773513), (39, 535509), (69, 302679), (117, 178503), (169, 123579), (199, 104949), (207, 100893), (299, 69849), (351, 59501), (507, 41193), (597, 34983), (621, 33631), (897, 23283), (1521, 13731), (1791, 11661), (2587, 8073), (2691, 7761), (3887, 5373), (4563, 4577)]