81821584

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{393373}}^1$

素因数の和:393394

約数の個数: 20

約数和(自身を含む): 170724316

約数和(自身を除く): 88902732

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 393373, 786746, 1573492, 3146984, 5113849, 6293968, 10227698, 20455396, 40910792, 81821584]

約数ペア:

[(1, 81821584), (2, 40910792), (4, 20455396), (8, 10227698), (13, 6293968), (16, 5113849), (26, 3146984), (52, 1573492), (104, 786746), (208, 393373)]