81476980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{313373}}^1$

素因数の和:313395

約数の個数: 24

約数和(自身を含む): 184263912

約数和(自身を除く): 102786932

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 313373, 626746, 1253492, 1566865, 3133730, 4073849, 6267460, 8147698, 16295396, 20369245, 40738490, 81476980]

約数ペア:

[(1, 81476980), (2, 40738490), (4, 20369245), (5, 16295396), (10, 8147698), (13, 6267460), (20, 4073849), (26, 3133730), (52, 1566865), (65, 1253492), (130, 626746), (260, 313373)]