19902337

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{257}}^1$

素因数の和:337

約数の個数: 32

約数和(自身を含む): 26353152

約数和(自身を除く): 6450815

約数列:

[1, 7, 13, 23, 37, 91, 161, 257, 259, 299, 481, 851, 1799, 2093, 3341, 3367, 5911, 5957, 9509, 11063, 23387, 41377, 66563, 76843, 77441, 123617, 218707, 537901, 865319, 1530949, 2843191, 19902337]

約数ペア:

[(1, 19902337), (7, 2843191), (13, 1530949), (23, 865319), (37, 537901), (91, 218707), (161, 123617), (257, 77441), (259, 76843), (299, 66563), (481, 41377), (851, 23387), (1799, 11063), (2093, 9509), (3341, 5957), (3367, 5911)]