20913620

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{11491}}^1$

素因数の和:11520

約数の個数: 48

約数和(自身を含む): 54058368

約数和(自身を除く): 33144748

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820, 11491, 22982, 45964, 57455, 80437, 114910, 149383, 160874, 229820, 298766, 321748, 402185, 597532, 746915, 804370, 1045681, 1493830, 1608740, 2091362, 2987660, 4182724, 5228405, 10456810, 20913620]

約数ペア:

[(1, 20913620), (2, 10456810), (4, 5228405), (5, 4182724), (7, 2987660), (10, 2091362), (13, 1608740), (14, 1493830), (20, 1045681), (26, 804370), (28, 746915), (35, 597532), (52, 402185), (65, 321748), (70, 298766), (91, 229820), (130, 160874), (140, 149383), (182, 114910), (260, 80437), (364, 57455), (455, 45964), (910, 22982), (1820, 11491)]