19019720

素因数分解:

$2^3\times 5^1\times {\mathrm{241}}^1\times {\mathrm{1973}}^1$

素因数の和:2225

約数の個数: 32

約数和(自身を含む): 42993720

約数和(自身を除く): 23974000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 241, 482, 964, 1205, 1928, 1973, 2410, 3946, 4820, 7892, 9640, 9865, 15784, 19730, 39460, 78920, 475493, 950986, 1901972, 2377465, 3803944, 4754930, 9509860, 19019720]

約数ペア:

[(1, 19019720), (2, 9509860), (4, 4754930), (5, 3803944), (8, 2377465), (10, 1901972), (20, 950986), (40, 475493), (241, 78920), (482, 39460), (964, 19730), (1205, 15784), (1928, 9865), (1973, 9640), (2410, 7892), (3946, 4820)]