19979799

素因数分解:

$3^1\times 7^2\times {\mathrm{199}}^1\times {\mathrm{683}}^1$

素因数の和:899

約数の個数: 24

約数和(自身を含む): 31190400

約数和(自身を除く): 11210601

約数列:

[1, 3, 7, 21, 49, 147, 199, 597, 683, 1393, 2049, 4179, 4781, 9751, 14343, 29253, 33467, 100401, 135917, 407751, 951419, 2854257, 6659933, 19979799]

約数ペア:

[(1, 19979799), (3, 6659933), (7, 2854257), (21, 951419), (49, 407751), (147, 135917), (199, 100401), (597, 33467), (683, 29253), (1393, 14343), (2049, 9751), (4179, 4781)]