20037620

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{103}}^1\times {\mathrm{137}}^1$

素因数の和:320

約数の個数: 48

約数和(自身を含む): 43400448

約数和(自身を除く): 23362828

約数列:

[1, 2, 4, 5, 10, 20, 71, 103, 137, 142, 206, 274, 284, 355, 412, 515, 548, 685, 710, 1030, 1370, 1420, 2060, 2740, 7313, 9727, 14111, 14626, 19454, 28222, 29252, 36565, 38908, 48635, 56444, 70555, 73130, 97270, 141110, 146260, 194540, 282220, 1001881, 2003762, 4007524, 5009405, 10018810, 20037620]

約数ペア:

[(1, 20037620), (2, 10018810), (4, 5009405), (5, 4007524), (10, 2003762), (20, 1001881), (71, 282220), (103, 194540), (137, 146260), (142, 141110), (206, 97270), (274, 73130), (284, 70555), (355, 56444), (412, 48635), (515, 38908), (548, 36565), (685, 29252), (710, 28222), (1030, 19454), (1370, 14626), (1420, 14111), (2060, 9727), (2740, 7313)]