199909980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{1110611}}^1$

素因数の和:1110626

約数の個数: 36

約数和(自身を含む): 606394152

約数和(自身を除く): 406484172

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 1110611, 2221222, 3331833, 4442444, 5553055, 6663666, 9995499, 11106110, 13327332, 16659165, 19990998, 22212220, 33318330, 39981996, 49977495, 66636660, 99954990, 199909980]

約数ペア:

[(1, 199909980), (2, 99954990), (3, 66636660), (4, 49977495), (5, 39981996), (6, 33318330), (9, 22212220), (10, 19990998), (12, 16659165), (15, 13327332), (18, 11106110), (20, 9995499), (30, 6663666), (36, 5553055), (45, 4442444), (60, 3331833), (90, 2221222), (180, 1110611)]