19899990

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{20101}}^1$

素因数の和:20125

約数の個数: 48

約数和(自身を含む): 56446416

約数和(自身を除く): 36546426

約数列:

[1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 30, 33, 45, 55, 66, 90, 99, 110, 165, 198, 330, 495, 990, 20101, 40202, 60303, 100505, 120606, 180909, 201010, 221111, 301515, 361818, 442222, 603030, 663333, 904545, 1105555, 1326666, 1809090, 1989999, 2211110, 3316665, 3979998, 6633330, 9949995, 19899990]

約数ペア:

[(1, 19899990), (2, 9949995), (3, 6633330), (5, 3979998), (6, 3316665), (9, 2211110), (10, 1989999), (11, 1809090), (15, 1326666), (18, 1105555), (22, 904545), (30, 663333), (33, 603030), (45, 442222), (55, 361818), (66, 301515), (90, 221111), (99, 201010), (110, 180909), (165, 120606), (198, 100505), (330, 60303), (495, 40202), (990, 20101)]