20681475

素因数分解:

$3^1\times 5^2\times {\mathrm{313}}^1\times {\mathrm{881}}^1$

素因数の和:1207

約数の個数: 24

約数和(自身を含む): 34341552

約数和(自身を除く): 13660077

約数列:

[1, 3, 5, 15, 25, 75, 313, 881, 939, 1565, 2643, 4405, 4695, 7825, 13215, 22025, 23475, 66075, 275753, 827259, 1378765, 4136295, 6893825, 20681475]

約数ペア:

[(1, 20681475), (3, 6893825), (5, 4136295), (15, 1378765), (25, 827259), (75, 275753), (313, 66075), (881, 23475), (939, 22025), (1565, 13215), (2643, 7825), (4405, 4695)]