20561925

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{16127}}^1$

素因数の和:16157

約数の個数: 24

約数和(自身を含む): 35997696

約数和(自身を除く): 15435771

約数列:

[1, 3, 5, 15, 17, 25, 51, 75, 85, 255, 425, 1275, 16127, 48381, 80635, 241905, 274159, 403175, 822477, 1209525, 1370795, 4112385, 6853975, 20561925]

約数ペア:

[(1, 20561925), (3, 6853975), (5, 4112385), (15, 1370795), (17, 1209525), (25, 822477), (51, 403175), (75, 274159), (85, 241905), (255, 80635), (425, 48381), (1275, 16127)]