20078877

素因数分解:

$3^1\times 7^3\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1$

素因数の和:135

約数の個数: 64

約数和(自身を含む): 35840000

約数和(自身を除く): 15761123

約数列:

[1, 3, 7, 13, 19, 21, 39, 49, 57, 79, 91, 133, 147, 237, 247, 273, 343, 399, 553, 637, 741, 931, 1027, 1029, 1501, 1659, 1729, 1911, 2793, 3081, 3871, 4459, 4503, 5187, 6517, 7189, 10507, 11613, 12103, 13377, 19513, 19551, 21567, 27097, 31521, 36309, 50323, 58539, 73549, 81291, 84721, 136591, 150969, 220647, 254163, 352261, 409773, 514843, 956137, 1056783, 1544529, 2868411, 6692959, 20078877]

約数ペア:

[(1, 20078877), (3, 6692959), (7, 2868411), (13, 1544529), (19, 1056783), (21, 956137), (39, 514843), (49, 409773), (57, 352261), (79, 254163), (91, 220647), (133, 150969), (147, 136591), (237, 84721), (247, 81291), (273, 73549), (343, 58539), (399, 50323), (553, 36309), (637, 31521), (741, 27097), (931, 21567), (1027, 19551), (1029, 19513), (1501, 13377), (1659, 12103), (1729, 11613), (1911, 10507), (2793, 7189), (3081, 6517), (3871, 5187), (4459, 4503)]