20517777

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{281}}^1$

素因数の和:374

約数の個数: 48

約数和(自身を含む): 36366720

約数和(自身を除く): 15848943

約数列:

[1, 3, 7, 9, 19, 21, 57, 61, 63, 133, 171, 183, 281, 399, 427, 549, 843, 1159, 1197, 1281, 1967, 2529, 3477, 3843, 5339, 5901, 8113, 10431, 16017, 17141, 17703, 24339, 37373, 48051, 51423, 73017, 112119, 119987, 154269, 325679, 336357, 359961, 977037, 1079883, 2279753, 2931111, 6839259, 20517777]

約数ペア:

[(1, 20517777), (3, 6839259), (7, 2931111), (9, 2279753), (19, 1079883), (21, 977037), (57, 359961), (61, 336357), (63, 325679), (133, 154269), (171, 119987), (183, 112119), (281, 73017), (399, 51423), (427, 48051), (549, 37373), (843, 24339), (1159, 17703), (1197, 17141), (1281, 16017), (1967, 10431), (2529, 8113), (3477, 5901), (3843, 5339)]