18319780

素因数分解:

$2^2\times 5^1\times {\mathrm{641}}^1\times {\mathrm{1429}}^1$

素因数の和:2079

約数の個数: 24

約数和(自身を含む): 38558520

約数和(自身を除く): 20238740

約数列:

[1, 2, 4, 5, 10, 20, 641, 1282, 1429, 2564, 2858, 3205, 5716, 6410, 7145, 12820, 14290, 28580, 915989, 1831978, 3663956, 4579945, 9159890, 18319780]

約数ペア:

[(1, 18319780), (2, 9159890), (4, 4579945), (5, 3663956), (10, 1831978), (20, 915989), (641, 28580), (1282, 14290), (1429, 12820), (2564, 7145), (2858, 6410), (3205, 5716)]