18999990

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{107}}^1\times {\mathrm{1973}}^1$

素因数の和:2093

約数の個数: 48

約数和(自身を含む): 49886928

約数和(自身を除く): 30886938

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 107, 214, 321, 535, 642, 963, 1070, 1605, 1926, 1973, 3210, 3946, 4815, 5919, 9630, 9865, 11838, 17757, 19730, 29595, 35514, 59190, 88785, 177570, 211111, 422222, 633333, 1055555, 1266666, 1899999, 2111110, 3166665, 3799998, 6333330, 9499995, 18999990]

約数ペア:

[(1, 18999990), (2, 9499995), (3, 6333330), (5, 3799998), (6, 3166665), (9, 2111110), (10, 1899999), (15, 1266666), (18, 1055555), (30, 633333), (45, 422222), (90, 211111), (107, 177570), (214, 88785), (321, 59190), (535, 35514), (642, 29595), (963, 19730), (1070, 17757), (1605, 11838), (1926, 9865), (1973, 9630), (3210, 5919), (3946, 4815)]