19304680

素因数分解:

$2^3\times 5^1\times {\mathrm{487}}^1\times {\mathrm{991}}^1$

素因数の和:1489

約数の個数: 32

約数和(自身を含む): 43568640

約数和(自身を除く): 24263960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 487, 974, 991, 1948, 1982, 2435, 3896, 3964, 4870, 4955, 7928, 9740, 9910, 19480, 19820, 39640, 482617, 965234, 1930468, 2413085, 3860936, 4826170, 9652340, 19304680]

約数ペア:

[(1, 19304680), (2, 9652340), (4, 4826170), (5, 3860936), (8, 2413085), (10, 1930468), (20, 965234), (40, 482617), (487, 39640), (974, 19820), (991, 19480), (1948, 9910), (1982, 9740), (2435, 7928), (3896, 4955), (3964, 4870)]