178398860

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1\times {\mathrm{1721}}^1$

素因数の和:1874

約数の個数: 48

約数和(自身を含む): 385342272

約数和(自身を除く): 206943412

約数列:

[1, 2, 4, 5, 10, 20, 71, 73, 142, 146, 284, 292, 355, 365, 710, 730, 1420, 1460, 1721, 3442, 5183, 6884, 8605, 10366, 17210, 20732, 25915, 34420, 51830, 103660, 122191, 125633, 244382, 251266, 488764, 502532, 610955, 628165, 1221910, 1256330, 2443820, 2512660, 8919943, 17839886, 35679772, 44599715, 89199430, 178398860]

約数ペア:

[(1, 178398860), (2, 89199430), (4, 44599715), (5, 35679772), (10, 17839886), (20, 8919943), (71, 2512660), (73, 2443820), (142, 1256330), (146, 1221910), (284, 628165), (292, 610955), (355, 502532), (365, 488764), (710, 251266), (730, 244382), (1420, 125633), (1460, 122191), (1721, 103660), (3442, 51830), (5183, 34420), (6884, 25915), (8605, 20732), (10366, 17210)]