13217420

素因数分解:

$2^2\times 5^1\times {\mathrm{641}}^1\times {\mathrm{1031}}^1$

素因数の和:1681

約数の個数: 24

約数和(自身を含む): 27826848

約数和(自身を除く): 14609428

約数列:

[1, 2, 4, 5, 10, 20, 641, 1031, 1282, 2062, 2564, 3205, 4124, 5155, 6410, 10310, 12820, 20620, 660871, 1321742, 2643484, 3304355, 6608710, 13217420]

約数ペア:

[(1, 13217420), (2, 6608710), (4, 3304355), (5, 2643484), (10, 1321742), (20, 660871), (641, 20620), (1031, 12820), (1282, 10310), (2062, 6410), (2564, 5155), (3205, 4124)]