19015720

素因数分解:

$2^3\times 5^1\times {\mathrm{431}}^1\times {\mathrm{1103}}^1$

素因数の和:1545

約数の個数: 32

約数和(自身を含む): 42923520

約数和(自身を除く): 23907800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 431, 862, 1103, 1724, 2155, 2206, 3448, 4310, 4412, 5515, 8620, 8824, 11030, 17240, 22060, 44120, 475393, 950786, 1901572, 2376965, 3803144, 4753930, 9507860, 19015720]

約数ペア:

[(1, 19015720), (2, 9507860), (4, 4753930), (5, 3803144), (8, 2376965), (10, 1901572), (20, 950786), (40, 475393), (431, 44120), (862, 22060), (1103, 17240), (1724, 11030), (2155, 8824), (2206, 8620), (3448, 5515), (4310, 4412)]