20889990

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{21101}}^1$

素因数の和:21125

約数の個数: 48

約数和(自身を含む): 59254416

約数和(自身を除く): 38364426

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, 21101, 42202, 63303, 105505, 126606, 189909, 211010, 232111, 316515, 379818, 464222, 633030, 696333, 949545, 1160555, 1392666, 1899090, 2088999, 2321110, 3481665, 4177998, 6963330, 10444995, 20889990]

約数ペア:

[(1, 20889990), (2, 10444995), (3, 6963330), (5, 4177998), (6, 3481665), (9, 2321110), (10, 2088999), (11, 1899090), (15, 1392666), (18, 1160555), (22, 949545), (30, 696333), (33, 633030), (45, 464222), (55, 379818), (66, 316515), (90, 232111), (99, 211010), (110, 189909), (165, 126606), (198, 105505), (330, 63303), (495, 42202), (990, 21101)]