665860

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{197}}^1$

素因数の和:232

約数の個数: 36

約数和(自身を含む): 1521828

約数和(自身を除く): 855968

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 169, 197, 260, 338, 394, 676, 788, 845, 985, 1690, 1970, 2561, 3380, 3940, 5122, 10244, 12805, 25610, 33293, 51220, 66586, 133172, 166465, 332930, 665860]

約数ペア:

[(1, 665860), (2, 332930), (4, 166465), (5, 133172), (10, 66586), (13, 51220), (20, 33293), (26, 25610), (52, 12805), (65, 10244), (130, 5122), (169, 3940), (197, 3380), (260, 2561), (338, 1970), (394, 1690), (676, 985), (788, 845)]