20715905

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{313}}^1$

素因数の和:417

約数の個数: 32

約数和(自身を含む): 29902848

約数和(自身を除く): 9186943

約数列:

[1, 5, 7, 31, 35, 61, 155, 217, 305, 313, 427, 1085, 1565, 1891, 2135, 2191, 9455, 9703, 10955, 13237, 19093, 48515, 66185, 67921, 95465, 133651, 339605, 591883, 668255, 2959415, 4143181, 20715905]

約数ペア:

[(1, 20715905), (5, 4143181), (7, 2959415), (31, 668255), (35, 591883), (61, 339605), (155, 133651), (217, 95465), (305, 67921), (313, 66185), (427, 48515), (1085, 19093), (1565, 13237), (1891, 10955), (2135, 9703), (2191, 9455)]