19845640

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{12101}}^1$

素因数の和:12153

約数の個数: 32

約数和(自身を含む): 45745560

約数和(自身を除く): 25899920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 12101, 24202, 48404, 60505, 96808, 121010, 242020, 484040, 496141, 992282, 1984564, 2480705, 3969128, 4961410, 9922820, 19845640]

約数ペア:

[(1, 19845640), (2, 9922820), (4, 4961410), (5, 3969128), (8, 2480705), (10, 1984564), (20, 992282), (40, 496141), (41, 484040), (82, 242020), (164, 121010), (205, 96808), (328, 60505), (410, 48404), (820, 24202), (1640, 12101)]