20639775

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{21169}}^1$

素因数の和:21195

約数の個数: 24

約数和(自身を含む): 36751120

約数和(自身を除く): 16111345

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 195, 325, 975, 21169, 63507, 105845, 275197, 317535, 529225, 825591, 1375985, 1587675, 4127955, 6879925, 20639775]

約数ペア:

[(1, 20639775), (3, 6879925), (5, 4127955), (13, 1587675), (15, 1375985), (25, 825591), (39, 529225), (65, 317535), (75, 275197), (195, 105845), (325, 63507), (975, 21169)]