20758605

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{61}}^1\times {\mathrm{463}}^1$

素因数の和:546

約数の個数: 48

約数和(自身を含む): 39354624

約数和(自身を除く): 18596019

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 61, 105, 147, 183, 245, 305, 427, 463, 735, 915, 1281, 1389, 2135, 2315, 2989, 3241, 6405, 6945, 8967, 9723, 14945, 16205, 22687, 28243, 44835, 48615, 68061, 84729, 113435, 141215, 197701, 340305, 423645, 593103, 988505, 1383907, 2965515, 4151721, 6919535, 20758605]

約数ペア:

[(1, 20758605), (3, 6919535), (5, 4151721), (7, 2965515), (15, 1383907), (21, 988505), (35, 593103), (49, 423645), (61, 340305), (105, 197701), (147, 141215), (183, 113435), (245, 84729), (305, 68061), (427, 48615), (463, 44835), (735, 28243), (915, 22687), (1281, 16205), (1389, 14945), (2135, 9723), (2315, 8967), (2989, 6945), (3241, 6405)]